merenchyman.
/məˈrɛŋkᵻmə/, U.S. /məˈrɛŋkəmə/ Botany. Now rare.
A type of parenchymatous tissue in a plant, composed of ellipsoidal or spheroidal cells loosely packed so as to leave wide spaces between them; (in later use) spec. tissue in the pith of trees that is composed of unpitted elongated cells.
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the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > specific types of tissue
parenchyma1651
parenchyme1811
suberin1815
mesophyllum1832
prosenchyma1832
cinenchyma1835
bothrenchyma1838
merenchyma1839
pleurenchyma1839
mesophyll1848
trachenchyma1848
inenchyma1851
sterenchyma1856
collenchyma1857
rhytidome1861
procambium1872
palisade tissue1875
trace1875
taphrenchyma1876
phellem1877
ground-tissue1882
palisade parenchyma1882
stone-sclerenchyma1884
stereome1885
aerenchyma1889
chlorenchyma1894
1839 W. Francis tr. F. J. F. Meyen Rep. Progress Veg. Physiol. 17 M. Morren is..of opinion, that these short pleurenchymatous cells are of the same origin and purport as the other cells, and are produced as it were from spheroid cells, the so-called merenchyma.
1839 J. Lindley Introd. Bot. (ed. 3) i. i. 7 (note) Professor Morren has proposed the following nomenclature of tissue, which has some advantages over that now more commonly in use. I. Parenchyma; 1. merenchyma, or sphærenchyma, spherical; 2. conenchyma, conical [etc.].
1839 J. Lindley Introd. Bot. (ed. 3) i. i. 15 Meyen has Merenchyma [1848 Merenchym] for ellipsoidal and spheroidal cells.
1849 J. H. Balfour Man. Bot. 3 Merenchyma.., ellipsoidal cells.
1870 A. Henfrey & M. T. Masters Elem. Course Bot. (ed. 2) 500 Imperfect parenchyma (merenchyma) is composed of cells with more or less rounded surfaces connected into a lax tissue.
1900 B. D. Jackson Gloss. Bot. Terms Merenchyma cells, unpitted cells in the pith of trees, with intercellular spaces, and much elongated radially.
This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022).
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