tunica
Americannoun
plural
tunicaenoun
-
anatomy tissue forming a layer or covering of an organ or part, such as any of the tissue layers of a blood vessel wall
-
botany the outer layer or layers of cells of the meristem at a shoot tip, which produces the epidermis and cells beneath it Compare corpus
Etymology
Origin of tunica
< New Latin, special use of Latin tunica tunic
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
These mimic the layered structure of the native vascular wall, which, from inside out, is composed of the tunica intima, tunica media and tunica adventitia tissues.
From Science Daily • Jan. 13, 2024
The tunica externa prevents blood cell adhesion to the wall of the vessel.
From Textbooks • Jun. 9, 2022
The tunica externa protects the vessel from wear and tear and also provides support for the vessel.
From Textbooks • Jun. 9, 2022
Specifically in arteries, vasoconstriction decreases blood flow as the smooth muscle in the walls of the tunica media contracts, making the lumen narrower and increasing blood pressure.
From Textbooks • Jun. 19, 2013
A, tunica adventitia; E, elastic coat; M, muscular coat; F, fenestrated coat; En, endothelium continuous with the endothelial wall of C, the capillaries.
From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" by Various
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
