Cytology. A bipolar configuration of fibres to which the chromosomes become attached by their centromeres at metaphase of mitosis before being…

any of the microtubular strands which form the visible structure of a spindle (sense 4c above).

An area of a cell in which mitochondria are aggregated (now rare, perhaps obsolete); (later) an organelle in the cytoplasm of certain protozoans…

any spindle fibre which is attached to a chromosome.

A unipolar (monopolar) or half spindle; (also) a single aster (aster, n. 4(a)). Cf. amphiaster, n.

the karyokinetic spindle of the dividing blastomere.

the compound structure found at the end of a chromosome in eukaryotes, having only one spindle pole.