The Collaborative International Dictionary of English v.0.48:
Cymule \Cy"mule\ (s?"m?l), n. [Cf. L. cymula a tender sprout, dim. of cyna. See Cyme.] (Bot.) A small cyme, or one of very few flowers. [1913 Webster]WordNet (r) 3.0 (2006):
cymule n 1: a small cyme, generally with few flowers