| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
Etymology: methyl + ethyl + pyridine
: a liquid base C 5 H 3 N(CH 3 )(C 2 H 5 ) that has a penetrating odor, is usually made by catalytic reaction of paraldehyde with ammonia, and is used chiefly in organic synthesis (as of nicotinic acid) — called also aldehyde collidine, aldehydine, collidine, 2-methyl-5-ethylpyridine