micropyle
noun
- Bot.
- a very small opening in the outer coats of an ovule, through which the pollen tube penetrates
- the corresponding opening in the developed seed
- Zool. a very small opening in the membrane of an ovum of some animals, through which spermatozoa can enter
See micropyle in American Heritage Dictionary 4
(mīˈkrə-pīlˌ)
noun- Botany A minute opening in the ovule of a seed plant through which the pollen tube usually enters.
- Zoology A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter.
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