adder's-mouth

[ad-erz-mouth]
noun, plural ad·der's-mouths [ad-erz-mouth z, -mouths] /ˈæd ərzˌmaʊðz, -ˌmaʊθs/.
  1. any of several North American, terrestrial orchids of the genus Malaxis, having tiny white or greenish flowers.
  2. rose pogonia.

Origin of adder's-mouth

An Americanism dating back to 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for adder's-mouth

adder's-mouth

noun
  1. any of various orchids of the genus Malaxis that occur in all parts of the world except Australia and New Zealand and have small usually greenish flowersSee also bog orchid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012