1. Anatomy The tissue characteristic of an organ, as distinguished from associated connective or supporting tissues.
2. Botany A simple plant tissue, composed of thin-walled cells and forming the greater part of leaves, roots, the pulp of fruit, and the pith of stems.
[New Latin, from Greek parenkhuma, visceral flesh, from parenkhein, to pour in beside : para-, beside; see PARA-1 + en-, in; see en in the Appendix of Indo-European roots + khein, to pour; see gheu- in the Appendix of Indo-European roots.]
pa·renchy·mal, par′en·chyma·tous (păr′ĕn-kĭmə-təs) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.