fertilization cone
Protuberance on an ovum where the spermatozoon fuses with the ovum.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • fertilization cone — noun : entrance cone * * * fertilization cone, = entrance cone. (Cf. ↑entrance cone) …   Useful english dictionary

  • fertilization cone — a bulging of the cytoplasm in the oocyte at the site of contact of a spermatozoon, which gradually engulfs the spermatozoon and then retracts, carrying the spermatozoon inward; called also attraction c …   Medical dictionary

  • entrance cone — noun 1. : the protuberance of cytoplasm through which the fertilizing sperm enters an egg 2. : the portion of a wind tunnel from which the air flows to the test section * * * entrance cone, a conical projection formed by the protoplasm of an egg… …   Useful english dictionary

  • attraction cone — fertilization c …   Medical dictionary

  • Conifer cone — Mature female Lodgepole Pine cone An Aleppo Pine cone ( …   Wikipedia

  • plant — plantable, adj. plantless, adj. plantlike, adj. /plant, plahnt/, n. 1. any member of the kingdom Plantae, comprising multicellular organisms that typically produce their own food from inorganic matter by the process of photosynthesis and that… …   Universalium

  • conifer — /koh neuh feuhr, kon euh /, n. 1. any of numerous, chiefly evergreen trees or shrubs of the class Coniferinae (or group Coniferales), including the pine, fir, spruce, and other cone bearing trees and shrubs, and also the yews and their allies… …   Universalium

  • cycadophyte — ▪ plant Introduction       any member of a diverse collection of mostly extinct primitive gymnospermous plants. They probably had their origins among the progymnosperms of the Devonian Period (416 to 359 million years ago), possibly among a… …   Universalium

  • Pinophyta — Conifer redirects here. For other uses, see Conifer (disambiguation). Pinophyta Temporal range: Late Carboniferous Recent …   Wikipedia

  • Mollusca — Temporal range: Cambrian–Recent …   Wikipedia

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