sugar of milk
lactose lac"tose` (l[a^]k"t[=o]s`), n. 1. (Physiol. Chem.) The main sugar present in milk, called also {sugar of milk} or {milk sugar}. When isolated pure it is obtained crystalline; it is separable from the whey by evaporation and crystallization. It is a disaccharide with the formula {C12H22O11}, being chemically 4-([beta]-D-galactosido)-D-glucose. It has a slightly sweet taste, is dextrorotary, and is much less soluble in water than either cane sugar or glucose. Formerly called {lactin}. When hydrolyzed it yields glucose and galactose. In cells it may be hydrolyzed by the enzyme [beta]-galactosidase. [1913 Webster +PJC]

2. (Chem.) See {Galactose}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Sugar of milk — Milk Milk (m[i^]lk), n. [AS. meoluc, meoloc, meolc, milc; akin to OFries. meloc, D. melk, G. milch, OHG. miluh, Icel. mj[=o]lk, Sw. mj[ o]lk, Dan. melk, Goth. miluks, G. melken to milk, OHG. melchan, Lith. milszti, L. mulgere, Gr. ame lgein.… …   The Collaborative International Dictionary of English

  • Sugar of milk — Sugar Sug ar, n. [OE. sugre, F. sucre (cf. It. zucchero, Sp. az[ u]car), fr. Ar. sukkar, assukkar, fr. Skr. [,c]arkar[=a] sugar, gravel; cf. Per. shakar. Cf. {Saccharine}, {Sucrose}.] 1. A sweet white (or brownish yellow) crystalline substance,… …   The Collaborative International Dictionary of English

  • sugar of milk — n. LACTOSE …   English World dictionary

  • sugar of milk — lactose. [1745 55] * * * sugar of milk, = lactose. (Cf. ↑lactose) …   Useful english dictionary

  • sugar of milk — noun Lactose, a disaccharide found in milk …   Wiktionary

  • sugar of milk — lactose. [1745 55] * * * …   Universalium

  • sugar of milk — noun → lactose …   Australian English dictionary

  • Sugar of lead — Sugar Sug ar, n. [OE. sugre, F. sucre (cf. It. zucchero, Sp. az[ u]car), fr. Ar. sukkar, assukkar, fr. Skr. [,c]arkar[=a] sugar, gravel; cf. Per. shakar. Cf. {Saccharine}, {Sucrose}.] 1. A sweet white (or brownish yellow) crystalline substance,… …   The Collaborative International Dictionary of English

  • Milk sugar — Milk Milk (m[i^]lk), n. [AS. meoluc, meoloc, meolc, milc; akin to OFries. meloc, D. melk, G. milch, OHG. miluh, Icel. mj[=o]lk, Sw. mj[ o]lk, Dan. melk, Goth. miluks, G. melken to milk, OHG. melchan, Lith. milszti, L. mulgere, Gr. ame lgein.… …   The Collaborative International Dictionary of English

  • Milk — (m[i^]lk), n. [AS. meoluc, meoloc, meolc, milc; akin to OFries. meloc, D. melk, G. milch, OHG. miluh, Icel. mj[=o]lk, Sw. mj[ o]lk, Dan. melk, Goth. miluks, G. melken to milk, OHG. melchan, Lith. milszti, L. mulgere, Gr. ame lgein. [root]107. Cf …   The Collaborative International Dictionary of English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”