Caustic Definition

kôstĭk
adjective
That can burn, eat away, or destroy tissue by chemical action; corrosive.
Webster's New World
Cutting or sarcastic in utterance; biting.
Webster's New World
Given to making caustic remarks.
A caustic TV commentator.
American Heritage
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.
Webster's New World
noun
Any caustic substance, esp. caustic soda.
Webster's New World
A caustic surface or curve.
Webster's New World
The enveloping surface formed by light rays reflecting or refracting from a curved surface, especially one with spherical aberration.
American Heritage

Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.

Wiktionary
(mathematics) The envelope of reflected or refracted rays for a given curve.
Wiktionary

Other Word Forms of Caustic

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

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