Noun | 1. | ![]() aperture - a natural opening in something germ pore - a pore in the outer wall of a spore or pollen grain through which the germ tube or pollen tube makes its exit on germination hydathode, water pore, water stoma - a pore that exudes water on the surface or margin of a leaf of higher plants lenticel - one of many raised pores on the stems of woody plants that allow the interchange of gas between the atmosphere and the interior tissue |
2. | 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) colostomy - a surgical operation that creates an opening from the colon to the surface of the body to function as an anus tracheostomy, tracheotomy - a surgical operation that creates an opening into the trachea with a tube inserted to provide a passage for air; performed when the pharynx is obstructed by edema or cancer or other causes orifice, porta, opening - an aperture or hole that opens into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart" surgery - the branch of medical science that treats disease or injury by operative procedures; "he is professor of surgery at the Harvard Medical School" |