[ˈkɒstɪk], (Adjective)

Definitions:
- able to burn or corrode organic tissue by chemical action
(e.g: a caustic cleaner)

- sarcastic in a scathing and bitter way
(e.g: the players were making caustic comments about the refereeing)

- formed by the intersection of reflected or refracted parallel rays from a curved surface


Phrases:

Origin:
late Middle English: via Latin from Greek kaustikos, from kaustos ‘combustible’, from kaiein ‘to burn’

[ˈkɒstɪk], (Noun)

Definitions:
- a caustic substance

- a caustic surface or curve


Phrases:

Origin:
late Middle English: via Latin from Greek kaustikos, from kaustos ‘combustible’, from kaiein ‘to burn’