noun British Dialect.
the dry, usually hollow stem or stalk of various plants, especially of large plants belonging to the parsley family, as cow parsnip or wild chervil.
Origin of kex
1350–1400; Middle English; of uncertain origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any of several large hollow-stemmed umbelliferous plants, such as cow parsnip and chervil
the dried stalks of any of these plants
Word Origin for kex
C14: of obscure origin
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
"dry, hollow plant stem," late 14c., of uncertain origin. Klein says ultimately from Latin cicuta "hemlock."
Online Etymology Dictionary, © 2010 Douglas Harper