lactase

[lak-teys, -teyz]

Origin of lactase

First recorded in 1890–95; lact- + -ase
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for lactase

lactase

noun
  1. any of a group of enzymes that hydrolyse lactose to glucose and galactose

Word Origin for lactase

C20: from lacto- + -ase
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

lactase in Medicine

lactase

[lăktās′]
n.
  1. A galactosidase occurring in the intestine that catalyzes the hydrolysis of lactose into glucose and galactose.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

lactase in Science

lactase

[lăktās′]
  1. An enzyme that is found in the small intestine, liver, and kidneys of mammals and catalyzes the breakdown of lactose into galactose and glucose.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.