-ole

1. A usually heterocyclic chemical compound containing a five-membered ring: pyrrole.
2. A chemical compound, especially an ether, that does not contain hydroxyl: eucalyptol.

[Partly from French (from Latin oleum, oil; see oil) and partly variant of -OL¹.]

1. A usually heterocyclic chemical compound containing a five-membered ring: pyrrole.
2. A chemical compound, especially an ether, that does not contain hydroxyl: indole.