There are 4 main definitions of lac in English:

Share this entry

lac 1

Pronunciation: /lak/

noun

[mass noun]
A resinous substance secreted as a protective covering by the lac insect, used to make varnish, shellac, sealing wax, dyes, etc.

Origin

Late Middle English: from medieval Latin lac, lac(c)a, from Portuguese laca, based on Hindi lākh or Persian lāk.

For editors and proofreaders

Line breaks: lac

Share this entry
 

There are 4 main definitions of lac in English:

Share this entry

lac 2

Pronunciation: /lak/

adjective

Biology
Denoting the ability of normal strains of the bacterium E. coli to metabolize lactose, or the genetic factors involved in this ability (which is lost in some mutant strains): the lac operon
More example sentences
  • These strains might not even use their lac gene products to metabolize lactose.
  • In addition to the lac operon, a number of other synthetic and natural genetic circuits have been analyzed for robustness and evolvability.
  • A metabolite of lactose binds to the lac repressor, changing the protein's shape and thereby causing it to loosen its grip on the DNA.

Origin

1940s: abbreviation of lactose.

For editors and proofreaders

Line breaks: lac

Share this entry
 

There are 4 main definitions of lac in English:

Share this entry

lac 3

Pronunciation: /lak/
Pronunciation: /lɑːk/

noun

Variant spelling of lakh.

For editors and proofreaders

Line breaks: lac

Share this entry
 

There are 4 main definitions of lac in English:

Share this entry

LAC 4

abbreviation

Leading Aircraftman or Leading Aircraftwoman.

For editors and proofreaders

Line breaks: LAC

Share this entry
 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.