1879 Coin Chart Manual (N.Y.) 2 Value of U.S. Dollar... Roomania... 5 Lei 18¹/ ₈ Ben Paras.

1896 Hist. Banking III. vii. 333 Up to 1877 Roumania had no paper money. In that year, however, the Government issued non-compulsory notes of 5, 10, 20, 50, 100, and 500 lei.

1902 Encycl. Brit. XXXI. 291/1 In Rumania the unit of account is the leu of 100 bani.

1921 S. Graham Europe viii. 107 The twenty, the hundred, the thousand-crown notes are almost identical... Roumanian lei are also much the same in appearance.

1940 G. Crowther Outl. Money viii. 305 Germany pushes up the value of the Reichsmark relatively to, say, the Roumanian leu; that enables her to quote a very attractive price, in lei, for wheat, without it costing her too much in Reichsmarks.

1967 Economist 19 Aug. (Suppl.) p. xlii/3 All families with a joint income of 2,000 lei..are now obliged to buy their flat.

1945 E. Brand et al. in Jrnl. Amer. Chem. Soc. 67 1531/2 The empirical formula in terms of amino acid residues is (using the first 3 letters of each as the symbol for the amino acid residues): Gly₈Ala₂₉Val₂₁Leu₅₀Ileu₂₇Pro₁₅Phe₉CySH₄(CyS-)₈-[etc.].

1985 Sci. Amer. Oct. 119/1 Many features of neuropeptides are exemplified by the two enkephalins... One, called met-enkephalin, ends with methionine and the other, leu-enkephalin, with leucine.

2009 Jrnl. Amer. Soc. Mass Spectrometry 20 1708/2 A blood sample was found to contain three variants, one of which involved a mutation to either Leu or Ile.