The Collaborative International Dictionary of English v.0.48:

Ipomoea \Ip`o*m[oe]"a\ ([i^]p`[-o]*m[=e]"[.a]), prop. n. [NL.
   "Named, according to Linn[ae]us, from Gr. 'i`ps, 'ipo`s, a
   bindweed [which it is not], and "o`moios like." --Gray.]
   (Bot.)
   A genus of twining plants with showy monopetalous flowers,
   including the morning-glory, the sweet potato, and the
   cypress vine.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Ipomoea
    n 1: morning glory [syn: Ipomoea, genus Ipomoea]