Source : Webster's Revised Unabridged Dictionary (1913)

Sula \Su"la\, n. [NL., fr. Icel. s?la the gannet. See {Solan
   goose}.] (Zo["o]l.)
   A genus of sea birds including the booby and the common
   gannet.

Source : WordNet®

Sula
     n : type genus of the Sulidae [syn: {genus Sula}]