deer's tongue noun2 •A plant native to the southeastern US, Trilisa odoratissima, whose fleshy leaves give out a fragrance resembling vanilla.L. odoratissima Willd. VANILLA-PLANT. DEER'S-TONGUE. — 1861 •A not closely related plant native to the northwestern US and western Canada, Achlys triphylla, which also has a vanilla-like fragrance.
