micropyle

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MICROPYLE

Mi "cro *pyle, n. Etym: [Micro- + Gr. micropyle. ] (Biol.)(a ) An opening in the membranes surrounding the ovum, by which nutrition is assisted and the entrance of the spermatozoa permitted. (b ) An opening in the outer coat of a seed, through which the fecundating pollen enters the ovule. -- Mi *crop "y *lar, a.

micropyle

mi cro pyle |ˈmīkrəˌpīl ˈmaɪkrəpaɪl | ▶noun Botany a small opening in the surface of an ovule, through which the pollen tube penetrates, often visible as a small pore in the ripe seed. • a small opening in the egg of a fish, insect, etc. , through which spermatozoa can enter. DERIVATIVES mi cro py lar |ˌmīkrəˈpīlər |adjective ORIGIN early 19th cent.: from micro- ‘small ’ + Greek pulē ‘gate. ’

micropyle

micropyle |ˈmʌɪkrə (ʊ )pʌɪl | ▶noun Botany a small opening in the surface of an ovule, through which the pollen tube penetrates, often visible as a small pore in the ripe seed. • Zoology a small opening in the egg of a fish, insect, etc. , through which spermatozoa can enter. ORIGIN early 19th cent.: from micro- ‘small ’ + Greek pulē ‘gate ’.