aster /as·ter/ (as´ter) [L.] a system of microtubules arranged in starlike rays around each pair of centrioles during mitosis. 
)
Asters separating in prophase of mitosis.
as·ter ( s t r)n. See astrosphere. |
Aster
genus of selenium indicator plants in the family Asteraceae; preferentially accumulates selenium from the soil. Includes A. adscendens, A. coerulescens, A. commutatus, A. ericoides, A. glaucoides, A. laevis var. geyeri. See also xylorrhiza.
aster
a structure occurring in dividing cells, composed of microtubules radiating from a centrosome. The two asters are the poles of the mitotic spindle.
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