Try Our Apps


Avoid these words. Seriously.


[in-sahy-zer] /ɪnˈsaɪ zər/
noun, Dentistry.
any of the four anterior teeth in each jaw, used for cutting and gnawing.
Origin of incisor
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. 2018.
Cite This Source
Examples from the Web for incisors
Contemporary Examples
Historical Examples
  • His tusks are his incisors, and they have developed as have almost no other teeth in the mammals.

    The Meaning of Evolution Samuel Christian Schmucker
  • After the incisors, the premolars show the greatest number of anomalies.

    Criminal Man Gina Lombroso-Ferrero
  • “The only offensive thing I have is a pair of incisors,” said the water-rat.

    "Wee Tim'rous Beasties" Douglas English
  • There are twenty teeth; in each jaw there are eight molars and two incisors.

    In Beaver World

    Enos Abijah Mills
  • The incisors are orthodont; the rostrum is short and the braincase is wide.

  • The incisors indicate the age, but they are not usually liable to disease.

    The Horse's Mouth Edward Mayhew
  • The animal had found the ball, seized it between the incisors, and extracted it.

  • The incisors are generally 2/2, and the molars, except in the Hapalidae, are 3/3.

    The Vertebrate Skeleton Sidney H. Reynolds
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
Cite This Source
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
Cite This Source
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.
Cite This Source
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.
Cite This Source
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 New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

Word of the Day

Nearby words for incisors

Difficulty index for incisor

Some English speakers likely know this word

Word Value for incisors

Scrabble Words With Friends