Caustic definition

kôstĭk
Sarcastic or cutting; biting.
adjective
10
1
Cutting or sarcastic in utterance; biting.
adjective
7
0
(of language etc.) Sharp, bitter, cutting, biting, sarcastic.
adjective
3
0
Capable of burning, corroding, dissolving, or eating away by chemical action.
adjective
3
1
(mathematics) The envelope of reflected or refracted rays for a given curve.
noun
1
0
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A hydroxide of a light metal.
noun
2
2
A caustic material or substance.
noun
1
1
The definition of caustic is a substance that burns or eats away by chemical reaction or a hurtful remark or relationship.

An example of caustic is the effect mustard gas has on the skin.

An example of caustic is a boyfriend who is emotionally abusive to his girlfriend.

adjective
0
0
That can burn, eat away, or destroy tissue by chemical action; corrosive.
adjective
0
0
Any caustic substance, esp. caustic soda.
noun
0
0
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Capable of burning, corroding or destroying organic tissue.
adjective
0
0
Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.
noun
0
0
(optics, computer graphics) The envelope of reflected or refracted rays of light for a given surface or object.
noun
0
0
(informal, chemistry) Caustic soda.
noun
0
0
Given to making caustic remarks.

A caustic TV commentator.

adjective
7
8
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The enveloping surface formed by light rays reflecting or refracting from a curved surface, especially one with spherical aberration.
noun
1
2
Designating or of the curved radial surface, or a plane curve in this surface, formed by the reflection or refraction of rays from a curved solid surface.
adjective
0
1
A caustic surface or curve.
noun
0
1

Other Word Forms

Noun

Singular:
caustic
Plural:
caustics

Origin of caustic

  • Middle English caustik from Latin causticus from Greek kaustikos from kaustos from kaiein kau- to burn

    From American Heritage Dictionary of the English Language, 5th Edition

  • From the Greek καυστός (kaustos, “burnt”), via the Latin causticus (“burning”).

    From Wiktionary