| kinetochore | <cell biology> Multilayered structure, a pair of which develop on the mitotic chromosome, adjacent to the centromere and to which spindle microtubules attach but not at the end normally associated with a microtubule organising centre. (18 Nov 1997) |
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| kinetochore fibres | Fibres of the mitotic spindle attached to the centromere and extending toward the poles. Compare: astral fibres, polar fibres. (05 Mar 2000) |
| kinetochores | Large multiprotein complexes that bind the centromeres of the chromosomes to the microtubules of the mitotic spindle during metaphase in the cell cycle. (12 Dec 1998) |