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Glossary of Reproduction - Development Terms
beginning with letter N
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neoteny Tweet Definition of neoteny Like Definition of neoteny on Facebook
noun
  1. (biology) The retention of juvenile characteristics in the adult; seen, for example, in amphibians
  2. (biology) The sexual maturity of an organism still in its larval stage
neural crest Tweet Definition of neural crest Like Definition of neural crest on Facebook
noun
  1. (anatomy) a strip of ectodermal material in the early vertebrate embryo inserted between the prospective neural plate and the epidermis
neurula Tweet Definition of neurula Like Definition of neurula on Facebook
noun
  1. (ZoÝÂlogy): An embryo, or certain invertebrates in the stage when the primitive band is first developed.
neurulation Tweet Definition of neurulation Like Definition of neurulation on Facebook
noun
  1. the process by which the beginnings of the vertebrate nervous system is formed in embryos
neuter Tweet Definition of neuter Like Definition of neuter on Facebook
noun
  1. A person who takes no part in a contest; one who is either indifferent to a cause or forbears to interfere; a neutral.
    • Young " The world"s no ; it will wound or save
      1. (grammar) A noun of the neuter gender; any one of those words which have the terminations usually found in neuter words.
      2. (grammar) An intransitive verb.
      3. (biology) An organism, either vegetable or animal, which at its maturity has no generative organs, or but imperfectly developed ones, as a plant without stamens or pistils, as the garden Hydrangea; especially, one of the imperfectly developed females of certain social insects, as of the ant and the common honeybee, which perform the labors of the community, and are called workers.
verb
  1. To remove sex organs from an animal to prevent it from having offspring; to castrate or spay, particularly as applied to domestic animals.
adjective
  1. (archaic) Neither the one thing nor the other; on neither side; impartial; neutral.
    • South " In all our undertakings God will be either our friend or our enemy; for Providence never stands
      1. (grammar) Having a form belonging more especially to words which are not appellations of males or females; expressing or designating that which is of neither sex
      a noun; a termination; the gender
      1. (grammar) intransitive, Intransitive
      a verb
      1. (biology) Having no generative organs, or imperfectly developed ones; sexless.
notochord Tweet Definition of notochord Like Definition of notochord on Facebook
noun
  1. A flexible rodlike structure that forms the main support of the body in the lowest chordates; a primitive spine
  2. A similar structure found in the embryos of vertebrates from which the spine develops

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