- stoma, stomate, pore - a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
--1 is a kind of aperture
--1 has particulars: hydathode, water pore, water stoma; lenticel - stoma - a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)
--2 is a kind of orifice, opening, porta
--2 is a part of colostomy; tracheostomy, tracheotomy