[lak-tohs] /ˈlæk toʊs/
Biochemistry. a disaccharide, C 12 H 22 O 11 , present in milk, that upon hydrolysis yields glucose and galactose.
a white, crystalline, sweet, water-soluble commercial form of this compound, obtained from whey and used in infant feedings, in confections and other foods, in bacteriological media, and in pharmacology as a diluent and excipient.
a white crystalline disaccharide occurring in milk and used in the manufacture of pharmaceuticals and baby foods. Formula: C12H22O11 Also called milk sugar
sugar from milk, 1858, from French, coined by French chemist Marcelin-Pierre-Eugène Berthelot (1827-1907) from Latin lac (genitive lactis) “milk” (see lactation) + chemical suffix -ose (2).
lactose lac·tose (lāk’tōs’)
adjective unable to digest lactose (milk sugar) due to a deficiency of lactase, an enzyme for metabolization of lactose, unable to digest milk and some dairy products; also written lactose intolerant
/ˌlæktəʊˈsjʊərɪə/ noun 1. (med) the presence of lactose in the urine lactosuria lac·to·su·ri·a (lāk’tə-sur’ē-ə, -shur’-) n. The presence of lactose in the urine.
lactotherapy lac·to·ther·a·py (lāk’tō-thěr’ə-pē) n. See galactotherapy.
lactotropin lac·to·tro·pin (lāk’tō-trō’pĭn) n. See prolactin.