The Sanskrit term Hṛdayacakra can be transliterated into English as Hrdayacakra or Hridayacakra, using the IAST transliteration scheme (?).

Alternative spellings of this word include Hridayachakra.

In Buddhism

Tibetan Buddhism (Vajrayana or tantric Buddhism)

Source: academia.edu: The Structure and Meanings of the Heruka Maṇḍala

Hṛdayacakra (हृदयचक्र) refers to the “heart circle” positioned in the sahaja-puṭa or ‘innate layer’ of the Herukamaṇḍala: a large-scale and elaborate maṇḍala of Heruka, consisting of 986 deities, as found in the Ḍākārṇava chapter 15.—The Herukamaṇḍala consists of four layers (puṭa) consisting of concentric circles (cakra, totally one lotus at the center and 12 concentric circles, that is, 13 circles in total).

The hṛdayacakra contains 36 pairs of Ḍākinī and Hero, collectively called Light Heruka (laghuheruka):

1. Vajradharī & Vajradhara,
2. Akṣobhyī & Akṣobhya,
3. Vairocanī & Vairocana,
4. Ratneśikā & Ratneśika,
5. Padmanartī & Padmanarta,
6. Amoghī & Amogha,
7. Locanā & Locana,
8. Māmakī & Māmaka,
9. Pāṇḍarā & Pāṇḍara,
10. Tārā & Tāra,
11. Rūpavajrā & Rūpavajra,
12. Śabdavajrā & Śabdavajra,
13. Gandhavajrā & Gandhavajra,
14. Rasavajrā & Rasavajra,
15. Sparśavajrā & Sparśavajra,
16. Dharmadhātuvajrā & Dharmadhātuvajra,
17. Kṣitigarbhī & Kṣitigarbha,
18. Khagarbhakī & Khagarbhaka,
19. Pāṇī & Pāṇa (= Vajrapāṇī & Vajrapāṇa),
20. Lokanāthī & Lokanātha,
21. Sarvanī & Sarvana (= Sarvanivaraṇaviṣkambhinī & Sarvanivaraṇaviṣkambhina),
22. Samantabhadrī & Samantabhadra,
23. Ratnolkī & Ratnolka,
24. Nairātmyā & Nairātmya,
25. Bhṛkuṭī & Bhṛkuṭa,
26. Parṇasaurikā & Parṇasaurika,
27. Yamāntakī & Yamāntaka,
28. Prajñāntakī & Prajñāntaka,
29. Padmāntakī & Padmāntaka,
30. Vighnāntakī & Vighnāntaka,
31. Acalī & Acala,
32. Nīladaṇḍī & Nīladaṇḍa,
33. Ṭakkirājī & Ṭakkirāja,
34. Mahābalā & Mahābala,
35. Uṣṇīṣā & Uṣṇīṣa,
36. Sumbharājñī & Sumbharājña.

They are reddish yellow in color; they each have one face and four arms; they hold a skull bowl, a skull staff, a small drum, and a knife.

Source: MDPI Books: The Ocean of Heroes

Hṛdayacakra (हृदयचक्र) refers to the “heart circle”, according to the 10th-century Ḍākārṇava-tantra: one of the last Tibetan Tantric scriptures belonging to the Buddhist Saṃvara tradition consisting of 51 chapters.—Accordingly, “[...]  Now, furthermore, I shall explain this, the Heart Circle (hṛdayacakra), outside the [Adamantine Circle]. [Deities reside] in the middles of the circle’s spokes colored in reddish-yellow as follows: [...] The color [of their bodies] is the same as [the color] of the circle (reddish-yellow). [...]”.

context information

Tibetan Buddhism includes schools such as Nyingma, Kadampa, Kagyu and Gelug. Their primary canon of literature is divided in two broad categories: The Kangyur, which consists of Buddha’s words, and the Tengyur, which includes commentaries from various sources. Esotericism and tantra techniques (vajrayāna) are collected indepently.

See also (Relevant definitions)

Partial matches: Hridaya, Cakra.

Full-text (+92): Ratnashikhini, Padmanarteshvari, Pandaravasini, Ratnashikhin, Pandaravasa, Tara, Mahabali, Amogha, Pana, Vajrapani, Parnashabari, Ratnolka, Shabdavajra, Ratnolki, Vighnantaki, Takkiraji, Sumbharajni, Bhrikuta, Kshitigarbha, Ushnisha.

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