caustic

¹caus·tic

adj \ˈkȯ-stik\

Definition of CAUSTIC

: capable of destroying or eating away organic tissue and especially animal tissue by chemical action <silver nitrate and sulfuric acid are caustic agents>

—caus·ti·cal·ly \-sti-k(ə-)lē\ adverb

—caus·tic·i·ty \kȯ-ˈstis-ət-ē\ noun, plural caus·tic·i·ties