monosomy

mon·o·some  (mn-sm)

n.

1. A chromosome having no homologue, especially an unpaired X-chromosome.

2. A single ribosome.

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mono·somic (-smk) adj.

mono·somy n.

Thesaurus

Noun

1.

monosomy - chromosomal abnormality consisting of the absence of one chromosome from the normal diploid number chromosomal aberration, chromosomal anomaly, chromosonal disorder, chrosomal abnormality - any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities