Trica \Tri"ca\, n.; pl. Tricae. [NL.]

(Bot.) An apothecium in certain lichens, having a spherical surface marked with spiral or concentric ridges and furrows. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Trica \Tri"ca\, n.; pl. Tric[ae]. [NL.]

(Bot.) An apothecium in certain lichens, having a spherical surface marked with spiral or concentric ridges and furrows.

Source: Webster's Revised Unabridged Dictionary (1913)