paradermn.
/ˈparədəːm/, U.S. /ˈpɛrəˌdərm/ Biology. Now disused.† 1. Entomology. R. T. Lowne's name for: the membrane surrounding the pronymph of a blowfly. Obsolete. rare.
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the world > animals > invertebrates > phylum Arthropoda > class Insecta > order Diptera or flies > [noun] > member of > parts of > membrane enclosing pro-nymph
paraderm1892
1892 B. T. Lowne Anat., Physiol., Morphol., & Devel. Blow-fly iii. 296 The cellular covering of the pseudo-yelk is a new formation of parablastic origin... I have therefore termed it the paraderm.
1895 Cambr. Nat. Hist. V. 164 Lowne is of a contrary opinion; looking on the limiting membrane as a subsequent formation, he calls it the paraderm.
2. Embryology. The lower (endodermal) layer of the blastoderm. disused.
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1895 I. K. Funk et al. Standard Dict. Eng. Lang. II. Paraderm, that part of the vitellus of an ovum which forms cells that enter the body of the embryo.
1908 Philos. Trans. (Royal Soc.) B. 199 60 Its innermost layer consists of a complete sheet of yolk-entoderm cells (‘secondary’, or ‘cenogenetic’, entoderm; ‘paraderm’; ‘lecithophore’, etc., of various authors).
1913 J. W. Jenkinson Vertebr. Embryol. v. 105 The lower layer cells unite together finally to form a flat epithelium, the lower layer or paraderm (endoderm of most authors, but the term should be avoided at this stage).
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).
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n.1892