isocyanate
nounA chemical group, NCO.
nounA salt, ester, or anion of isocyanic acid.
nounAny of various compounds that contain an isocyanate group, NCO. Isocyanates are used mainly in production of polyurethane and can cause respiratory disorders, especially asthma, if inhaled.
nounA salt of isocyanic acid.
nounthe
a salt or ester of isocyanic acid