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单词 plasome
释义

plasomen.

Brit. /ˈplasəʊm/, /ˈpleɪsəʊm/, U.S. /ˈpleɪˌsoʊm/, /ˈplæˌsoʊm/
Origin: A borrowing from German. Etymon: German Plasom.
Etymology: < German Plasom (J. Wiesner 1890, in Sitzungsber. der Math.-Naturwissenschaftlichen Klasse der Kaiserl. Akad. der Wiss. 99 386), shortened < Wiesner's original term Plasmatosom (1886, in Sitzungsber. der Math.-Naturwissenschaftlichen Klasse der Kaiserl. Akad. der Wissensch. 93 65) < ancient Greek πλασματο- , combining form (in e.g. πλασματώδης fictitious) of πλασματ- , πλάσμα (see plasma n.) + ancient Greek σῶμα body (see soma n.2). N.E.D.(1907) gives only the pronunciation (plæ·soum) /ˈplæsəʊm/.
Biology. rare. Now historical.
Wiesner's term for: a supposed ultimate unit of living protoplasm.
ΘΚΠ
the world > life > biology > substance > cell > cell substance > [noun] > protoplasm or cytoplasm > unit of
bioplast1870
plastid1871
plastidule1872
cytoplast1885
plasome1891
idioblast1893
plasmosome1896
protoplast1898
biogen1899
1891 Jrnl. Royal Microsc. Soc. 207 Prof. J. Wiesner maintains that..the cell cannot be the ultimate elementary structure of the plant... For these living elements of the protoplasm which he formerly called plasmatosomes, the author now proposes the simpler term plasomes.
1895 New Sydenham Soc. Lexicon Plasome,..a term used by Brüche and Wiesner for hypothetical minute vital particles, made up of a group of protoplasmic molecules, and constituting the smallest units which can exhibit the primary vital [functions]. They correspond [to a certain extent] to Weismann's ‘biophors’, and to the ‘pangenes’ of de Vries.
1902 Encycl. Brit. XXXII. 41/1 In other cases the assumption of invisible protoplasmic units has been inspired by a desire..to explain the general vital and animative powers of protoplasm, as, for example, the ‘micellæ’ of Nägeli and the ‘plasomes’ of Wiesner.
This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).
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n.1891
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