Refers to a corrosive substance or an optical envelope of light rays.
Translations
caustiqueSubstance chimique corrosive, notamment en chimie. Always wear protective gloves when handling caustic.
Portez toujours des gants de protection lorsque vous manipulez un caustique.
A corrosive chemical substance, especially a strong alkali such as sodium hydroxide. Always wear protective gloves when handling caustic.
In optics, a curve or surface to which light rays reflected or refracted by another surface are tangential, producing concentrated light. The bright curve at the bottom of the glass is a caustic formed by the refracted sunlight.