tylosis

[tahy-loh-sis]
noun, plural tyloses [tahy-loh-seez] . Botany.
a bubblelike formation in the cavity of tracheids or vessels in the wood of trees, consisting of protoplasm intruded from adjacent parenchyma cells.
Also, tylose.


Origin:
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

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To tylosis
Collins
World English Dictionary
tylosis (taɪˈləʊsɪs)
 
n
botany a bladder-like outgrowth from certain cells in woody tissue that extends into and blocks adjacent conducting xylem cells
 
[C19: from Greek tulōsis, from tulos knob or tulē callus + -osis]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

tylosis ty·lo·sis (tī-lō'-sĭs)
n. pl. ty·lo·ses (-sēz)

  1. Inflammation of the eyelids, characterized by thickening and hardening of the edges.

  2. 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.
Cite This Source
Example sentences
The pores of red oak are generally clear of tylosis, making the wood unusable for tight cooperage.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature