Helianthoidea

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Helianthoidea \He`li*an"thoi"de*a\, n. pl. [NL., fr. L.
     helianthes sunflower + -oid.] (Zool.)
     An order of Anthozoa; the Actinaria.
     [1913 Webster]