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tonoplast

[ton-uh-plast, toh-nuh-]
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noun Botany.
  1. a membrane separating a vacuole from the surrounding cytoplasm in a plant cell.
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Origin of tonoplast

First recorded in 1885–90; tono- + -plast
Also called vacuolar membrane.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for tonoplast

tonoplast

noun
  1. botany the membrane enclosing a vacuole in a plant cell
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Word Origin

C20: from Greek tonos tone + -plast
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
tonoplast in Medicine

tonoplast

(tō′nə-plăst′)
n.
  1. An intracellular structure or vacuole.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.