† monoplastn.
Biology. Obsolete.
A unicellular organism; an ovum. Also: any of the particles of which cellular protoplasm is supposedly composed (rare).
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the world > life > biology > organism > organisms by number or kind of cells > [noun]
Euglena1858
monoplast1877
polyplastid1884
homoplastide1889
monoplastid1889
diploid1908
1877 E. R. Lankester in Q. Jrnl. Microsc. Sci. 17 403 The Monoplast = Ovum.
1887 Proc. Boston Soc. Nat. Hist. 23 397 The stages of holoblastic ova may be..classified as follows..(1) The ovum or Monoplast..; (2) the first stage of segmentation..; (3) the second stage of segmentation... We have proposed to classify these stages under the name of Protembryo.
1927–9 H. Wheeler Waverley Children's Dict. V. 2822/2 Monoplast,..a creature consisting of a single cell.
Derivatives
monoplastic adj.
ΘΚΠ
the world > life > biology > organism > organisms by number or kind of cells > [adjective]
monocellular1854
multicellular1857
unicellular1858
monoplastic1877
unicelled1877
multicelled1884
acellular1886
monoplastid1889
tricellular1891
single-celled1899
mixed-celled1908
microcellular1909
1877 E. R. Lankester in Q. Jrnl. Microsc. Sci. 17 403 The monoplastic phase of individual development.
1927–9 H. Wheeler Waverley Children's Dict. V. 2822/2 A monoplastic..organism is a single-celled one.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online June 2018).
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n.1877