aperture 2
noundomain: natural obj.
Princeton WordNet [ver.3.1]
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EnglishDefinition
a natural opening in something
EnglishHyponym
pupil 2
noun
the contractile aperture in the center of the iris of the eye; resembles a large black dot
micropyle 1
noun
minute opening in the wall of an ovule through which the pollen tube enters
stoma 1
noun
a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
Part_holonym
eye 1
noun
the organ of sight
