"stomas" in the noun sense
1. stoma, stomate, pore
a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License