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1. Minute opening believed to exist in the investing membrane of certain oocytes as a point of entrance for the sperm.
2. Former name for micropore.
[micro- + G. pylē, gate]
Farlex Partner Medical Dictionary © Farlex 2012
Zoology A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
micropylea small canal in the integument surrounding the ovule of a flowering plant, through which the POLLEN TUBE usually enters the ovule on the way to the EMBRYO SAC. Water enters the seed via the micropyle prior to GERMINATION.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005