The Collaborative International Dictionary of English v.0.48:
Hygeia \Hy*ge"ia\, n. [L. Hygea, Hygia, fr. Gr. ?, ?, health, ?, Hygeia, fr. ? sound, healthy.] (Classic Myth.) The goddess of health, daughter of Esculapius. [1913 Webster]WordNet (r) 3.0 (2006):
Hygeia n 1: (Greek mythology) the goddess of health; daughter of Aesculapius and sister of Panacea