'Formalin' definitions:

Definition of 'formalin'

From: WordNet
noun
A 10% solution of formaldehyde in water; used as a disinfectant or to preserve biological specimens [syn: formalin, formol]

Definition of 'Formalin'

From: GCIDE
  • Formalin \For"ma*lin\, n. [Formic + aldehyde + -in.] (Chem.) An aqueous solution of formaldehyde, used as a preservative in museums and as a disinfectant. [Webster 1913 Suppl.]