ranunculinn.
/rəˈnʌŋkjᵿlɪn/, U.S. /rəˈnəŋkjələn/ Biochemistry.
A glycoside produced by various plants of the family Ranunculaceae, which breaks down to form the toxic substance protoanemonin.
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saponin1829
neohesperidin1936
ranunculin1951
1951 R. Hill & R. van Heyningen in Biochem. Jrnl. 49 332/2 When the tissues are crushed the protoanemonin is liberated enzymically from a glucosidic precursor in the plant. The glucoside itself..is stable both as a solid and in aqueous solution. This substance..we propose to call ranunculin, as it has been obtained from several species of Ranunculus.
1971 Science 26 Feb. 763/1 The innocuous glycoside ranunculin,..found in buttercups,..breaks down to release the aglycone protoanemonin.
1994 Systematic Biol. 19 169/2 Cladistic analyses..place Anemone in a clade with Clematis, Hepatica, Pulsatilla, and Ranunculus, united by two derived character states, presence of achenes and the chemical compound ranunculin.
2007 I. D. Aitken Dis. Sheep (ed. 4) xi. 413/2 The aglycone protoanemonin..is hydrolysed from the harmless glycoside ranunculin in lesser celandine and lesser spearwort.
This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022).
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n.1951