tylosis

[ tahy-loh-sis ]
/ taɪˈloʊ sɪs /

noun, plural ty·lo·ses [tahy-loh-seez]. /taɪˈloʊ siz/. Botany.

a bubblelike formation in the cavity of tracheids or vessels in the wood of trees, consisting of protoplasm intruded from adjacent parenchyma cells.

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Often ty·lose [tahy-lohs, tahy-lohs] /ˈtaɪ loʊs, taɪˈloʊs/ .

Origin of tylosis

1875–80; <Greek týlōsis act of making callous, equivalent to tylō-, variant stem of tyloûn to make callous, hard, derivative of týlos callus, lump, knob + -sis-sis

Words nearby tylosis

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for tylosis

tylosis
/ (taɪˈləʊsɪs) /

noun

botany a bladder-like outgrowth from certain cells in woody tissue that extends into and blocks adjacent conducting xylem cells

Word Origin for tylosis

C19: from Greek tulōsis, from tulos knob or tulē callus + -osis
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

Medical definitions for tylosis

tylosis
[ tī-lō-sĭs ]

n. pl. ty•lo•ses (-sēz)

Inflammation of the eyelids, characterized by thickening and hardening of the edges.
A thickening of the horny layer of the skin as a result of chronic pressure or friction.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.