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micropyle

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.03 sec.
micropyle
an opening through which a spermatozoon enters certain ova.
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9 [micro]m diameter) that has a fairly conspicuous opening or micropyle to enable sperm penetration.
Breeding cycle and early development of the keyhole limpet Fissurella ... by Perez, Margarita C.; Gonzalez, Maria L.; Lopez, Daniel A. / Journal of Shellfish Research
In teleosts, the only common aspect is the absence of an acrosome, which has been related to the presence of a micropyle in the egg (Riehl, 1997).
Environmental contaminant-induced spermatozoa anomalies in fish ... by Abdelmeguid, Nabila E.; Kheirallah, Abdel-Moneim M.; Matta, Cecil A.; Abdel-Moneim, Ashraf M. / International Journal of Applied Environmental Sciences
57) oblong, bearing conspicuous micropyle at narrow end, opposite end is papillose; seed coat thick, woody, comprising nearly 20--25% of the diameter of the seed; empty individuals are dark brown to black in color, some specimens are reddish in color due to the reflectance of white endosperm within the seed; examination of endosperm from seeds shows cells intact; embryo present (Fig.
An illustrated catalogue of macroscopic subfossils from ... by Swinehart, Anthony L. / Proceedings of the Indiana Academy of Science
 
 
 
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