Definition of chromosome noun from the Oxford Advanced Learner's Dictionary

 

chromosome

 noun
noun
BrE BrE//ˈkrəʊməsəʊm//
 
; NAmE NAmE//ˈkroʊməsoʊm//
 
(biology) Genetic engineering, Cell biology
 
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one of the very small structures like threads in the nuclei (= central parts) of animal and plant cells, that carry the genes Humans have 23 pairs of chromosomes in their cells. see also sex chromosome, X chromosome, Y chromosome Wordfinderbiology, biotechnology, breed, cell, chromosome, DNA, gene, mutation, organism, protein See related entries: Genetic engineering, Cell biology Word Origin late 19th cent.: coined in German from Greek khrōma ‘colour’ + sōma ‘body’.
See the Oxford Advanced American Dictionary entry: chromosome