Oregon myrtle ore·gon·myrtle uncommon noun 1. Pacific coast tree having aromatic foliage and small umbellate flowers followed by olivelike fruit; yields a hard tough wood SynonymsCalifornia laurelCalifornia bay treeOregon myrtlepepperwoodspice treesassafras laurelCalifornia olivemountain laurelUmbellularia californica Related words Broader terms laurel Parts Umbellularia WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.