heterocyclic

(het″әr-o-sik´lik) (-si´klik) having or pertaining to a closed chain or ring formation that includes atoms of different elements.
Found on http://www.encyclo.co.uk/local/21001

heterocyclic

adjective containing a closed ring of atoms of which at least one is not a carbon atom
Found on https://www.encyclo.co.uk/local/20974

Heterocyclic

An organic group or molecule containing rings with at least one noncarbon atom on the ring.
Found on http://www.superglossary.com/Glossary/Science/Chemistry/

Heterocyclic

Fungi that requires two different hosts to complete their life cycle; i.e., some rust fungi.
Found on http://www.fs.fed.us/r3/resources/health/field-guide/glossary.shtml

heterocyclic

heterocycle; heterocyclic ring. An organic group or molecule containing rings with at least one noncarbon atom on the ring.
Found on http://antoine.frostburg.edu/chem/senese/101/glossary/h.shtml

heterocyclic

[adj] - containing a closed ring of atoms of which at least one is not a carbon atom
Found on http://www.webdictionary.co.uk/definition.php?query=heterocyclic
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