There are 4 main definitions of lac in English:

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lac1

Line breaks: lac

noun

[mass noun]

Origin

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

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There are 4 main definitions of lac in English:

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lac2

Line breaks: lac

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.

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There are 4 main definitions of lac in English:

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lac3

Line breaks: lac
Pronunciation: /lak
 
, lɑːk
 
/

noun

Variant spelling of lakh.

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There are 4 main definitions of lac in English:

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LAC4

Line breaks: LAC

abbreviation

Leading Aircraftman or Leading Aircraftwoman.

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