Modifies a noun

• thiopropanal-s-oxide: This species yield the lachrymatory thiopropanal-S-oxide from its biosynthetic precursor S-1-propenyl-L-cysteine sulfoxide when damaged ( Freeman & Whenham 1976 ).

• shell: All the troops had to wear their gas masks as the Germans fired lachrymatory shells as well as high explosive.

• gas: The stopping was nearing completion when the enemy flooded the mine with chloropicrin, a very powerful lachrymatory gas.