\Ge*neth"li*ac\, a. [L. genethliacus, Gr. ?, fr. ?
belonging to one's birth, gene`qlh birth, fr. gi`gnesqai to
be born.]
Pertaining to nativities; calculated by astrologers; showing
position of stars at one's birth. --Howell.

\Ge*neth"li*ac\, n.
1. A birthday poem.

2. One skilled in genethliacs.