laevo-levo-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly.

used as combining form of Latin lævus, in the sense ‘(turning or turned) to the left’, in physical and chemical terms, chiefly having reference to the property possessed by certain substances of causing the plane of a ray of polarized light to rotate to the left (cf. dextro- comb. form). Among these are:

laevoˈgyrate adj.

Brit.

/ˌliːvə(ʊ)ˈdʒʌɪrət/

/ˌliːvə(ʊ)ˈdʒʌɪreɪt/

U.S.

/ˌlivoʊˈdʒaɪˌreɪt/

(also lævoˈgyrous) characterized by turning the plane of polarization to the left.

a1856 Haydn (Cent. at Levogyrate) If the analyser has to be turned from right to left to obtain the natural order of colours, the quartz is called left-handed or levogyrate.

laevo-roˈtation n.

Brit.

/ˌliːvə(ʊ)rə(ʊ)ˈteɪʃn/

U.S.

/ˌlivoʊˌroʊˈteɪʃ(ə)n/

rotation to the left.

1882 Nature 19 Jan. 283/2 With each electrode, diverging currents produce dextro- and converging ones lævo-rotation.

laevo-ˈrotatory adj.

Brit.

/ˌliːvə(ʊ)rə(ʊ)ˈteɪt(ə)ri/

/ˌliːvə(ʊ)ˈrəʊtət(ə)ri/

U.S.

/ˌlivoʊˈroʊdəˌtɔri/

= laevogyrate adj.

1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 565 Both [oils] are levorotatory.

1897 T. C. Allbutt et al. Syst. Med. III. 216 When the urine is lævo-rotatory after trituration with Fehling.

laevo-ˈcompound n.

Brit.

/ˌliːvə(ʊ)ˈkɒmpaʊnd/

U.S.

/ˌlivoʊˈkɑmˌpaʊnd/

a chemical compound which causes lævo-rotation.

laevo-ˈglucose n.

Brit.

/ˌliːvə(ʊ)ˈɡluːkəʊz/

/ˌliːvə(ʊ)ˈɡluːkəʊs/

U.S.

/ˌlivoʊˈɡluˌkoʊs/

= laevulose n.

laevo-raˈcemic n.

Brit.

/ˌliːvə(ʊ)rəˈsiːmɪk/

U.S.

/ˌlivoʊˌreɪˈsimɪk/

/ˌlivoʊrəˈsimɪk/

1853 Pharm. Jrnl. & Trans. 13 111 Pasteur discovered that racemic acid is a compound of two acids, one of which turns the plane of polarization of a ray of light to the right, and the other to the left; he therefore called them Dextro-racemic-acid and Levo-racemic-acid.

laevo-tarˈtaric acid n.

Brit.

/ˌliːvə(ʊ)tɑːˌtarɪk ˈasɪd/

U.S.

/ˌlivoʊˌtɑrˌtɛrɪk ˈæsəd/

the modifications of racemic and tartaric acid which are lævo-rotatory.

1876 tr. P. Schützenberger On Fermentation 6 Paratartaric acid easily splits up..into dextro-tartaric and lævo-tartaric acid.

laevo-ˈracemate n.

Brit.

/ˌliːvə(ʊ)ˈrasᵻmeɪt/

U.S.

/ˌlivoʊˈræsəˌmeɪt/

laevo-ˈtartrate n.

Brit.

/ˌliːvə(ʊ)ˈtɑːtreɪt/

U.S.

/ˌlivoʊˈtɑrˌtreɪt/

the salts of these.

This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2022).

单词	laevo-
释义	laevo-levo-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. used as combining form of Latin lævus, in the sense ‘(turning or turned) to the left’, in physical and chemical terms, chiefly having reference to the property possessed by certain substances of causing the plane of a ray of polarized light to rotate to the left (cf. dextro- comb. form). Among these are: 1. laevoˈgyrate adj. Brit. /ˌliːvə(ʊ)ˈdʒʌɪrət/ , /ˌliːvə(ʊ)ˈdʒʌɪreɪt/ , U.S. /ˌlivoʊˈdʒaɪˌreɪt/ (also lævoˈgyrous) characterized by turning the plane of polarization to the left. Π a1856 Haydn (Cent. at Levogyrate) If the analyser has to be turned from right to left to obtain the natural order of colours, the quartz is called left-handed or levogyrate. laevo-roˈtation n. Brit. /ˌliːvə(ʊ)rə(ʊ)ˈteɪʃn/ , U.S. /ˌlivoʊˌroʊˈteɪʃ(ə)n/ rotation to the left. Π 1882 Nature 19 Jan. 283/2 With each electrode, diverging currents produce dextro- and converging ones lævo-rotation. laevo-ˈrotatory adj. Brit. /ˌliːvə(ʊ)rə(ʊ)ˈteɪt(ə)ri/ , /ˌliːvə(ʊ)ˈrəʊtət(ə)ri/ , U.S. /ˌlivoʊˈroʊdəˌtɔri/ = laevogyrate adj. Π 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 565 Both [oils] are levorotatory. 1897 T. C. Allbutt et al. Syst. Med. III. 216 When the urine is lævo-rotatory after trituration with Fehling. 2. laevo-ˈcompound n. Brit. /ˌliːvə(ʊ)ˈkɒmpaʊnd/ , U.S. /ˌlivoʊˈkɑmˌpaʊnd/ a chemical compound which causes lævo-rotation. laevo-ˈglucose n. Brit. /ˌliːvə(ʊ)ˈɡluːkəʊz/ , /ˌliːvə(ʊ)ˈɡluːkəʊs/ , U.S. /ˌlivoʊˈɡluˌkoʊs/ = laevulose n. laevo-raˈcemic n. Brit. /ˌliːvə(ʊ)rəˈsiːmɪk/ , U.S. /ˌlivoʊˌreɪˈsimɪk/ , /ˌlivoʊrəˈsimɪk/ Π 1853 Pharm. Jrnl. & Trans. 13 111 Pasteur discovered that racemic acid is a compound of two acids, one of which turns the plane of polarization of a ray of light to the right, and the other to the left; he therefore called them Dextro-racemic-acid and Levo-racemic-acid. laevo-tarˈtaric acid n. Brit. /ˌliːvə(ʊ)tɑːˌtarɪk ˈasɪd/ , U.S. /ˌlivoʊˌtɑrˌtɛrɪk ˈæsəd/ the modifications of racemic and tartaric acid which are lævo-rotatory. Π 1876 tr. P. Schützenberger On Fermentation 6 Paratartaric acid easily splits up..into dextro-tartaric and lævo-tartaric acid. laevo-ˈracemate n. Brit. /ˌliːvə(ʊ)ˈrasᵻmeɪt/ , U.S. /ˌlivoʊˈræsəˌmeɪt/ laevo-ˈtartrate n. Brit. /ˌliːvə(ʊ)ˈtɑːtreɪt/ , U.S. /ˌlivoʊˈtɑrˌtreɪt/ the salts of these. This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2022). < comb. form1853
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