pure-line

pure line

noun Genetics.
a uniform strain of organisms that is relatively pure genetically because of continued inbreeding and artificial selection.

Origin:
1905–10

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pure line
 
n
a breed or strain of animals or plants in which certain characters appear in successive generations as a result of inbreeding or self-fertilization

Collins English Dictionary - Complete & Unabridged 10th Edition
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