lipoidadj.n.

1876 J. Van Duyn & E. C. Seguin tr. E. L. Wagner Man. Gen. Pathol. 349 A peculiar ‘lipoid transformation’ of a fœtus.

1907 Biochem. Jrnl. 2 22 The lipöid material being mainly composed of an ester of cholesterin.

1946 Nature 13 July 41/1 Solution of the odorous substance in the lipoid or aqueous phase of these flagellæ is, therefore, the point from which all theories of osmic perception must proceed.

1974 Nature 1 Feb. 301/1 The uterine or milk glands in tsetse flies..release a nutritive liquid of proteinaceous and lipoid nature for the maturing intrauterine larva.

1906 Jrnl. Chem. Soc. 90 ii. 780 (heading) The influence of diffusibility and the solubility of lipoids on the rate of intestinal absorption.

1912 Biochem. Bull. 1 51 Fats and the substances resembling them (‘lipoids’).

1913 Jrnl. Chem. Soc. 104 i. 308 Can Lipoids Act as Antigens?

1925 W. R. Bloor in Chem. Rev. 2 244 Three terms have been suggested for the group, namely, ‘Lipins’ by Gies and Rosenbloom, ‘Lipides’ by the International Congress of Applied Chemistry, and the old term ‘Lipoids’ by the author. The term lipins has been used in a different sense by Leathes, and was later adopted by McLean in his monograph as a name for a subgroup containing the cerebrosides and the phosphatides. The term lipoids is understood by many to exclude the fats, although used in the wider sense by many workers on the Continent. For these reasons, and for the sake of uniformity, the author recommends the use of the term Lipides as the general group name.

1932 I. Smedley-MacLean in Ann. Rev. Biochem. 1 135 The term lipoid is retained..to denote the ether-soluble constituents of a tissue, without regard to their nature.

1946 W. R. Fearon Introd. Biochem. (ed. 3) x. 173 Lipoids.—These are biological compounds resembling the lipides in certain physical properties, notably solubility in fats.

1952 Chem. & Engin. News 5 May 1910/1 ‘Lipide’, however, has proved popular, replacing the older ‘lipoid’ and ‘lipin’, with a better defined meaning.

1955 S. H. Gaiger & G. O. Davies Vet. Pathol. & Bacteriol. (ed. 4) i. 6 All the normal body tissues contain fat in one form or another, the chief forms being neutral fat, fatty acids, soaps and lipoids (lecithin, cholesterol and myelin).

1958 Times Lit. Suppl. 17 Jan. 34/1 Living matter consists essentially of carbohydrates (or ‘sugars’), lipoids (or ‘fats’) and proteins.

1971 Nature 9 July 138/3 ‘Lipoid’ is used instead of the more usual ‘lipid’ throughout [the book].