Astramantra, Astra-mantra: 10 definitions
Introduction:
Astramantra means something in Hinduism, Sanskrit. If you want to know the exact meaning, history, etymology or English translation of this term then check out the descriptions on this page. Add your comment or reference to a book if you want to contribute to this summary article.
In Hinduism
Vastushastra (architecture)
Source: Google Books: Temple Consecration Rituals in Ancient IndiaAstramantra (अस्त्रमन्त्र, “weapon-mantra”): One of the five aṅgamantras (see Kāśyapaśilpa prathameṣṭakā 43c-44a) usually identified as phaṭ or as a formula containing phaṭ.

Vastushastra (वास्तुशास्त्र, vāstuśāstra) refers to the ancient Indian science (shastra) of architecture (vastu), dealing with topics such architecture, sculpture, town-building, fort building and various other constructions. Vastu also deals with the philosophy of the architectural relation with the cosmic universe.
Pancaratra (worship of Nārāyaṇa)
Source: archive.org: Isvara Samhita Vol 5Astramantra (अस्त्रमन्त्र) is the name of a mantra to be uttered during certain preparations of śuddhānna, according in verse 25.94-107a of the 8th-century Īśvarasaṃhitā. Accordingly, “... they (vessels) are to be washed without (outside) with water sanctified by astramantra and are to be rotated with pure cloth consecrated, by it (astramantra)”.
Source: archive.org: Catalogue of Pancaratra Agama Texts1) Astramantra (अस्त्रमन्त्र) refers to “mystic weapons” or “spellbound weapons”, according to the thirty-fourth chapter of the Ahirbudhnyasaṃhitā, a Pāñcarātra work in 60 chapters dealing with topics such as Viṣṇu’s discus-power, the processes of creation and esoteric practices related to Sudarśana (such as mantras and yantras).—Description of the chapter [brahmāstrādi-mantra-svarūpa-nirūpaṇa]: Nārada remembers that the mystic weapons (astramantra) were said to have had their source in Sudarśana, so he asks now about these astra-weapons. Ahirbudhnya at first hesitates to hand on such information—but then relents by giving one-by-one some sixty-one spells which, by the power invested in them by Sudarśana’s ever-active energy, can act as offensive or defensive weapons of a mystic kind. Each one of these astramantras has a characteristic mnemonic sound associated with it (1-105).
2) Astramantra (अस्त्रमन्त्र) is the name of a Mantra discussed in the twenty-eighth chapter of the Jayākhyasaṃhitā: a Pāñcarātra Āgama text composed of 4500 verses in 33 chapters dealing with topics such as mantra (formulas), japa (repetitions), dhyāna (meditations), mudrā (gesticulations), nyāsa (concentrations) etc.—Description of the chapter [aṅgamantra-sādhana]:—Here Bhagavān says he will treat of the mantras which are directed to the “limbs” of the devotee who then sees his limbs as analogous to the “Limbs” of the Lord—the mastery of which leads to certain powers. [For example, the astramantra (128-158a)] [...].
Source: Shodhganga: Kasyapa Samhita—Text on Visha Chikitsa (p)Astramantra (अस्त्रमन्त्र) is the name of an Aṅga-Mantra performed along with touching the respective place in one’s body, according to the Kāśyapa Saṃhitā: an ancient Sanskrit text from the Pāñcarātra tradition dealing with both Tantra and Viṣacikitsā (Toxicology).—The Astramantra is as follows: apratihataśāsana varma phaṭ svāhā.

Pancaratra (पाञ्चरात्र, pāñcarātra) represents a tradition of Hinduism where Narayana is revered and worshipped. Closeley related to Vaishnavism, the Pancaratra literature includes various Agamas and tantras incorporating many Vaishnava philosophies.
Shaktism (Shakta philosophy)
Source: Google Books: Consecration Rituals in South Asia (Shaktism)Astramantra (अस्त्रमन्त्र) refers to a particular type of Mantra used for sprinkling the pit, according to the Ratnanyāsa Ritual as Described in the Devyāmata (Cf. Dīptāgama verse 20.244).—Accordingly, [synopsis of verses 1-5]—“Offering of water from the water-vessel; purification of the ‘jewel-cavities’ by sprinkling the pit with the astramantra and ‘Śiva-water’ (śivavāri); covering the pit and the surface of the brahmaśilā with cloth; placing the darbha-grass on [or around] the pit; anointing the pit and the brahmaśilā with sandal-paste 5. Having offered incense, the Ācārya accompanied by the mūrtipās should begin the ratnanyāsa by depositing a handful of gold. [...]”.

Shakta (शाक्त, śākta) or Shaktism (śāktism) represents a tradition of Hinduism where the Goddess (Devi) is revered and worshipped. Shakta literature includes a range of scriptures, including various Agamas and Tantras, although its roots may be traced back to the Vedas.
Shaivism (Shaiva philosophy)
Source: SOAS University of London: Protective Rites in the Netra TantraAstramantra (अस्त्रमन्त्र) is the name of a Mantra, according to the Netratantra of Kṣemarāja: a Śaiva text from the 9th century in which Śiva (Bhairava) teaches Pārvatī topics such as metaphysics, cosmology, and soteriology.—Accordingly, [verse 2.28cd-33]—“Now, I shall explain the limbs of the mantra, with which, tied together, he achieves perfection. [...] The netra [aṅgamantra], [which is] most powerful and destroys all faults, begins with Bhairava [j], and an oṃ [and] situated with a head always in motion [y]. That astramantra is proclaimed ajīvaka [pha] [e.g., ajīvakaṭasaṃyuktam astram] joined with ṭa. The six aṅgas of the mantrarāṭ [i.e., the mṛtyuñjayamantra], which confers siddhis, is declared”.

Shaiva (शैव, śaiva) or Shaivism (śaivism) represents a tradition of Hinduism worshiping Shiva as the supreme being. Closely related to Shaktism, Shaiva literature includes a range of scriptures, including Tantras, while the root of this tradition may be traced back to the ancient Vedas.
Mantrashastra (the science of Mantras)
Source: archive.org: Catalogue of Pancaratra Agama Texts (mantra)Astramantra (अस्त्रमन्त्र) is the name of a Mantra mentioned in chapter 24 of the Lakṣmītantra: a Pāñcarātra text comprising some 3600 Sanskrit verses exclusively devoted to Goddess Lakṣmī or Śrī (the consort of Viṣṇu) besides dealing with cosmology and practical regarding Vaishnava priests and temple-building programs.—Description of the chapter [tāraprakāśa]: How to compose the tāramantra [OṂ] by using the varṇacakra-design is given (1-7). [...] The astramantra is discussed briefly (52b-79a).
Mantrashastra (शिल्पशास्त्र, mantraśāstra) refers to the ancient Indian science of mantras—chants, incantations, spells, magical hymns, etc. Mantra Sastra literature includes many ancient books dealing with the methods reciting mantras, identifying and purifying its defects and the science behind uttering or chanting syllables.
Languages of India and abroad
Sanskrit dictionary
Source: DDSA: The practical Sanskrit-English dictionaryAstramantra (अस्त्रमन्त्र).—a Mantra to be repeated in discharging or withdrawing a missile; संमोहनं नाम सखे ममास्त्रं प्रयोग- संहारविभक्तमन्त्रम् (saṃmohanaṃ nāma sakhe mamāstraṃ prayoga- saṃhāravibhaktamantram) R.5.57,59.
Derivable forms: astramantraḥ (अस्त्रमन्त्रः).
Astramantra is a Sanskrit compound consisting of the terms astra and mantra (मन्त्र).
Source: Cologne Digital Sanskrit Dictionaries: Monier-Williams Sanskrit-English DictionaryAstramantra (अस्त्रमन्त्र):—[=astra-mantra] [from astra] m. a Mantra used to charm arrows, [Raghuvaṃśa v, 59.]
[Sanskrit to German]
Sanskrit, also spelled संस्कृतम् (saṃskṛtam), is an ancient language of India commonly seen as the grandmother of the Indo-European language family (even English!). Closely allied with Prakrit and Pali, Sanskrit is more exhaustive in both grammar and terms and has the most extensive collection of literature in the world, greatly surpassing its sister-languages Greek and Latin.
See also (Relevant definitions)
Partial matches: Mantra, Astra.
Full-text (+36): Astra, Astiramantiram, Ahirbudhnyasamhita, Samharastra, Astrasvarupa, Samharastrasvarupanirupana, Brahmastradimantrasvarupanirupana, Pashaccheda, Samhara, Mantrasvarupa, Ullekhana, Digbandhanamantra, Ceta, Daha, Digbandhana, Mritika, Padamantra, Bhoktritva, Bhoktri, Kilbisha.
Relevant text
Search found 18 books and stories containing Astramantra, Astra-mantra, Astra mantras; (plurals include: Astramantras, mantras, Astra mantrases). You can also click to the full overview containing English textual excerpts. Below are direct links for the most relevant articles:
Isanasivagurudeva Paddhati (study) (by J. P. Prajith)
8. Initial ceremonial steps for Shiva Puja (worship) < [Chapter 4 - Worship of Gods and Goddesses]
10. Description of Homa-vidhi (or Agnikarya-vidhi) (sacrificial rites) < [Chapter 4 - Worship of Gods and Goddesses]
2. Worship of Shiva in Isanasivagurudeva-paddhati (Introduction) < [Chapter 4 - Worship of Gods and Goddesses]
Expiatory Rites in Keralite Tantra (by T. S. Syamkumar)
1.7. Expiatory Rites in Ājitāgama and Dīptāgama < [Chapter 2 - Expiatory Rites in Āgamic Literature]
1.6. Expiatory Rites in Rauravottarāgama < [Chapter 2 - Expiatory Rites in Āgamic Literature]
2. Expiatory Rites in Tantrasamuccaya < [Chapter 3 - Expiatory Rites in Kerala Tantric Ritual Manuals]
Shaivacintamani (analytical study) (by Swati Sucharita Pattanaik)
Part 2.2 - The mode of Lord Śiva’s worship < [Chapter 2: Śaivism in Śaiva Purāṇas of Odisha]
Linga Purana (by J. L. Shastri)
Chapter 24 - The mode of worship of Śiva (Continued) < [Section 2 - Pūrvabhāga]
Chapter 25 - The holy rites of fire pertaining to Śiva < [Section 2 - Pūrvabhāga]
Chapter 22 - The consecration of the Tattvas < [Section 2 - Pūrvabhāga]
Notices of Sanskrit Manuscripts (by Rajendralala Mitra)
A Descriptive Catalogue of the Sanskrit Manuscripts, Madras (by M. Seshagiri Sastri)