from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Anatomy The outer layer of an internal organ or body structure, as of the kidney or adrenal gland.
- n. Anatomy The outer layer of gray matter that covers the surface of the cerebral hemisphere.
- n. Botany The region of tissue in a root or stem lying between the epidermis and the vascular tissue.
- n. An external layer, such as bark or rind.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The outer layer of an internal organ or body structure, such as the kidney or the brain.
- n. The tissue of a stem or root that lies inward from the epidermis, but exterior to the vascular tissue.
from the GNU version of the Collaborative International Dictionary of English
- n. Bark, as of a tree; hence, an outer covering.
- n. Bark; rind; specifically, cinchona bark.
- n. The outer or superficial part of an organ.
from The Century Dictionary and Cyclopedia
- n. In botany: Bark, as of a tree. See bark.
- n. In Chara and some algæ, a covering of tubular or other cells inclosing the axis; in lichens, the cortical layer (which see, under cortical).
- n. Specifically, in medicine, Peruvian bark.
- n. In anatomy and zoology, some part or structure likened to bark or rind; cortical substance: as, the coriex of the brain.
- n. The peridium of fungi.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum
- n. the tissue forming the outer layer of an organ or structure in plant or animal
- n. the tissue that surrounds the lens nucleus
Latin, bark; see sker-1 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin cortex ("bark"). (Wiktionary)