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Glossary of Reproduction - Development Terms
beginning with letter Z
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zooid
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noun
  1. (Biol.) An organic body or cell having locomotion, as a spermatic cell or spermatozooid.
  2. (Zoí¶l.) (a) An animal in one of its inferior stages of development, as one of the intermediate forms in alternate generation. (b) One of the individual animals in a composite group, as of Anthozoa, Hydroidea, and Bryozoa; " sometimes restricted to those individuals in which the mouth and digestive organs are not developed.
zoon
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noun
  1. An animal which is the sole product of a single egg;
  2. Any one of the perfectly developed individuals of a compound animal.
zygosis
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noun (zygoses)
  1. (biology) The union of gametes to form a zygote; conjugation.
zygote
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noun
  1. A fertilize, fertilized egg cell.
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