[ṛ-tu-kicca Uṇ. 1. 71] 1 A sea- son, period of the year, commonly reckoned to be six; śiśiraśca vasaṃtaśca grīṣmo varṣāḥ śaraddhimaḥ; sometimes only five; śiśira and hima or hemaṃta being counted together; cf. paṃcartavo hemaṃtaśiśirayoḥ samā- sena Ait. Br.

2 An epoch, a period any fixed or appointed time.

3 Menstruation, courses, menstrual discharge.

4 A period favourable for conception; varamṛtuṣu...