معنی کلمه :‌ caustical

Severe; satirical; sharp; as, a caustic remark.

Capable of destroying the texture of anything or eating away its substance by chemical action; burning; corrosive; searing.

(a) Formerly, a soldier armed with a fusil. Hence, in the plural: (b) A title now borne by some regiments and companies; as, "The Royal Fusiliers," etc.