adj.
Pronunciation: ˌ pä-l ē - ' nü-kl ē - ə r, - ' nyü-, ÷-ky ə -l ə r
Function: adjective
Etymology: International Scientific Vocabulary
Date: 1908
: chemically polycyclic especially with respect to the benzene ring ― used chiefly of aromatic hydrocarbons that are important as pollutants and possibly as carcinogens