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[in-sahy-zer] /ɪnˈsaɪ zər/
noun, Dentistry.
any of the four anterior teeth in each jaw, used for cutting and gnawing.
1665-75; < New Latin: literally, cutter, equivalent to Latin incīd(ere) to incise + -tor -tor, with -dt- > -s- Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for incisors
  • The study compared incisors with incisors, and molars with molars.
  • Think of it as yet more evidence of a public firmly sinking its incisors into celebrity culture.
  • They have rodentlike incisors that never stop growing and are gnawed down on some of their tougher vegetarian fare.
  • Other incisors may touch on the inside corner at the top of the tooth.
  • The incisors are very small, the canines large, and the molars are tricuspid.
British Dictionary definitions for incisors


a chisel-edged tooth at the front of the mouth. In man there are four in each jaw
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for incisors



"cutting tooth," 1670s, from Medieval Latin incisor "a cutting tooth," literally "that which cuts into," from Latin incisus, past participle of incidere (see incision). Inscisours as the name of a cutting tool is attested from early 15c.

Online Etymology Dictionary, © 2010 Douglas Harper
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incisors in Medicine

incisor in·ci·sor (ĭn-sī'zər)
Any of the four teeth adapted for cutting or gnawing, having a chisel-shaped crown and a single conical root and located in the front part of both jaws in both deciduous and permanent dentitions.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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incisors in Science
A sharp-edged tooth in mammals that is adapted for cutting or gnawing. The incisors are located in the front of the mouth between the canine teeth.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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incisors in Culture
incisors [(in-seye-zuhrz)]

The sharp teeth at the front of the mouth (four on the top and four on the bottom) that are specialized for cutting. (Compare molars.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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