cata-condensed polycyclic

cata-condensed polycyclic

[‚kad·ə·kən′denst ‚päl·i′sī·klik]
(organic chemistry)
An aromatic compound in which no more than two rings have a single carbon atom in common.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.