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	lessor

	lest

	-let

	let (1)

	let (2)

	let down

	let in

	let in for

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	let into

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	let-out

	let’s

	let through

	let up

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lethal mutation

le·thal mu·ta·tion (plural le·thal mu·ta·tions)

noun

Definition:

genetic mutation that kills cells: a genetic mutation with an effect so serious that it often results in the death of the organism concerned

Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.

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