Dictionary Definition:
vatsá m. (prob. originally, 'yearling', fr. a lost word vatas) a calf, the young of any animal, offspring, child (voc. vatsa often used as a term of endearment = my dear child, my darling) RV. &c. &c
• a son, boy ( See bāla-v○)
• a year ( See tri-v○)
• N. of a descendant of Kaṇva RV. PañcavBr. ŚāṅkhŚr
• of an Āgneya (author of RV. x, 187) Anukr
• of a Kāsyapa Kathās
• of the step-brother of Maitreya (who passed through fire to prove the falseness of Maitreya's allegation that he was the child of a Śūdra) Mn. viii, 116 (Sch.) of a son of Pratardana MBh. Hariv
• of a son of Sena-jit Hariv
• of a son of Aksha-mālā Cat
• of a son of Uru-kshepa VP
• of a son of Soma-śarman Kathās
• of the author of a law-book Cat
• (with carakâdhvaryu-sūtra-kṛt) of another author ib
• of a serpent-demon VP
• N. of a country (whose chief town is Kauśāmbī) Kathās
• Nerium Aistidysentericum L
• the Kutaja tree L
• pl. the descendants of Vatsa ĀśvŚr. (cf. Pāṇ. 2-4, 64 Sch.)
• the inhabitants of the country called Vatsa MBh. Kathās
• (ā), f. a female calf, little daughter (voc. vatse = my dear child) Kālid. Uttarar. Prab. ; m. n. the breast, chest L. [Cf. vatsara and ? for ? ; Lat. vetus, vetus-tus, vitulus ; Germ. widar, Widder ; Eng. wether.]