neuter

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neuter

(no͞o′tər, nyo͞o′-)
adj.
1. Grammar
a. Neither masculine nor feminine in gender.
b. Neither active nor passive; intransitive. Used of verbs.
2. Biology
a. Having undeveloped or nonfunctional sexual organs: the neuter caste in social insects.
b. Having pistils and stamens that are nonfunctional or absent.
3. Castrated or spayed. Used of animals.
4. Androgynous or asexual.
n.
1. An androgynous or asexual person.
2. A castrated animal.
3. An insect that has undeveloped or nonfunctional sexual organs, such as a worker bee.
tr.v. neu·tered, neu·tering, neu·ters
To castrate or spay.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

neu·ter

(nū'tĕr)
To sterilize a male or female animal surgically.
[L. neither, i.e. neither male nor female]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

neuter

an organism having nonfunctional or absent sexual parts. In plants, a neuter is one without male and female flower parts (e.g. ray florets of sunflower). A neuter in animals is one that is sexually undeveloped or sterile, for example the female worker in a bee colony, or a castrated or spayed animal.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005