Think about it: when is the last time you saw an old-fashioned, God-fearing, biblically-correct heterocycle?.    From Wordnik.com.  [congratulations to all my gay friends] Reference

The recently registered substance is a novel arylmethylidene heterocycle with analgesic properties.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

Found throughout nature, this aromatic nitrogen heterocycle assumes the form of a potent cancer fighter in the vegetables everybody loves to hate: broccoli, brussel sprouts, cabbage.    From Wordnik.com. Reference