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单词 parellic
释义

parellicadj.

Brit. /pəˈrɛlɪk/, U.S. /pəˈrɛlɪk/
Origin: A borrowing from Latin, combined with an English element; modelled on a German lexical item. Etymons: Latin parellus , -ic suffix.
Etymology: < scientific Latin parellus (see perelle n.) + -ic suffix, after German Parellsäure (E. Schunck 1845, in Ann. der Chem. u. Pharm. 54 258).
Chemistry.
parellic acid n. a crystalline acid, C18H14O8, which is a depsidone obtained from various lichens, esp. Ochrolechia parella.
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the world > matter > chemistry > organic chemistry > acids obtained from lichens > [noun] > named
picrolichenin1835
parellic acid1850
stictic acid1868
patellaric acid1872
polyporic acid1877
vulpic acid1886
picrolichenic acid1902
1850 G. Fownes Man. Elem. Chem. (ed. 3) 522 Other substances are occasionally present in lichens; thus, the Lecanora parella gave in addition parellic acid, forming white, stellated prisms.
1866 H. Watts Dict. Chem. IV. 355 Parellic acid or Parellin... Parellic acid forms colourless needles, very slightly soluble in cold water, soluble in alcohol and in ether.
1946 Thorpe's Dict. Appl. Chem. (ed. 4) VII. 302/1 Later the acid [sc. psoronic acid] was found by Zopf and Hesse in various lichens and was called by the latter ‘parellic’ acid.
1997 Jrnl. Medicinal Chem. 40 946/2 Other depsidones such as physodic acid (4), norlobaric acid (13), salazinic acid (14), and the parellic acid (16) were also active at low micromolar concentrations.
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).
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adj.1850
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