1. relating to or of the nature of or having a mouth or mouthlike opening • Syn: stomatous • Pertains to noun: stoma (for: stomatous), stoma • Derivationally related forms: stoma (for: stomatous), stoma 2. relating to or constituting plant stomata - stomatal openings • Syn: stomatous • Pertains to noun: stoma (for: stomatous), stoma • Derivationally related forms: stoma (for: stomatous), stoma