egg layer
the usual mode of reproduction in fishes where eggs are laid outside the body and fertilised there by the male

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • Egg case (Chondrichthyes) — Egg case of a skate. An egg case or egg capsule, colloquially known as a mermaid s purse or devil s purse, is a casing that surrounds the fertilized eggs of some sharks, skates, and chimaeras. They are among the common objects which are washed up …   Wikipedia

  • Egg — may refer to the following:Biology*Egg (biology), an ovum together with its shell or outer layer, internal membranes and nutrients for the embryo. *Egg cell or ovum, a haploid female reproductive cell or gamete. *Oocyte, an immature egg… …   Wikipedia

  • egg — egg1 eggless, adj. eggy, adj. /eg/, n. 1. the roundish reproductive body produced by the female of certain animals, as birds and most reptiles, consisting of an ovum and its envelope of albumen, jelly, membranes, egg case, or shell, according to… …   Universalium

  • egg — 1. n. 1 a the spheroidal reproductive body produced by females of animals such as birds, reptiles, fish, etc., enclosed in a protective layer and capable of developing into a new individual. b the egg of the domestic hen, used for food. 2 Biol.… …   Useful english dictionary

  • Egg activation — After the fusion of the sperm plasma membrane and the egg plasma membrane after fertilization, animal eggs go through a process called egg activation to prepare the egg for development.There are three functions of egg activation: # Block to… …   Wikipedia

  • Egg Nebula — Protoplanetary nebula caption=RAFGL 2688, the Egg Nebula name = Egg Nebula type = epoch = J2000 ra = RA|21|02|18.75cite web title=SIMBAD Astronomical Database work=Results for Egg Nebula url=http://simbad.u strasbg.fr/Simbad accessdate=2007 01… …   Wikipedia

  • layer — layerable, adj. /lay euhr/, n. 1. a thickness of some material laid on or spread over a surface: a layer of soot on the window sill; two layers of paint. 2. bed; stratum: alternating layers of basalt and sandstone. 3. a person or thing that lays …   Universalium

  • layer — lay•er [[t]ˈleɪ ər[/t]] n. 1) a thickness of some material laid on or spread over a surface: a layer of soot on the window sill; two layers of paint[/ex] 2) bed; stratum: alternating layers of basalt and sandstone[/ex] 3) a person or thing that… …   From formal English to slang

  • layer — A sheet of one substance lying on another and distinguished from it by a difference in texture or color or by not being continuous with it. SEE ALSO: stratum, lamina. SYN: panniculus. ameloblastic l. the internal l. of the enamel organ. SYN: enam …   Medical dictionary

  • layer — lay·er || leɪə(r) n. thickness of some material that covers a surface; stratum, covering, bed; person or thing that lays; egg laying chicken; twig which is induced to root while still attached to the parent plant (Gardening) v. induce a twig… …   English contemporary dictionary

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