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aster

 [as´ter]
a structure occurring in dividing cells, composed of microtubules radiating from a centrosome. The two asters are the poles of the spindle apparatus.
 Asters separating in prophase of mitosis. From Dorland's, 2000.

as·tro·sphere

(as'trō-sfēr),
A set of radiating microtubules extending outward from the cytocentrum and centrosphere of a dividing cell.
[G. astron, star, + sphaira, ball]

aster

/as·ter/ (as´ter) [L.] a system of microtubules arranged in starlike rays around each pair of centrioles during mitosis.
Enlarge picture
Asters separating in prophase of mitosis.

aster

(ăs′tər)
n.
Biology A star-shaped structure formed in the cytoplasm of an animal cell during mitosis, having raylike microtubules that surround the centrosome.

as·tro·sphere

(as'trō-sfēr)
A set of radiating microtubules extending outward from the cytocentrum and centrosphere of a dividing cell.
Synonym(s): aster, attraction sphere.
[G. astron, star, + sphaira, ball]
Asterclick for a larger image
Fig. 54 Aster . Generalized form.

aster

a group of blind-ending SPINDLE MICROTUBULES radiating out from the CENTRIOLES of dividing cells in lower plants and all animals. The aster function is uncertain, but does not seem to be concerned with spindle formation.

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.
References in periodicals archive ?
The Britannia Restaurant is three decks high, with two tiered balconies set back above the central space and a handsome Gobelin tapestry depicting Queen Mary 2 departing New York with the Battery astern.
2 : in a reverse direction : backward <The ship went full speed astern.
But soon, performing a visual diminuendo, they drift well astern, a distant nebula of glittering pinpoints at the planet's indistinguishable edge.
From my position directly astern of the Arizona, I had a clear view of her when she got hit and blew up.
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According to the briefing, the vessels assigned to carry the shipments are British-registered and will each be armed with one cannon at the fore and another two astern.
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Thomas finished safely in the bunch to stay second in the general classification 12 seconds behind Froome with Italian champion Fabio Aru (Astana) a further two astern.
The charge McDonald faces relates to the debut of the Godolphin-owned and O'Sheatrained Astern, who started his career at Randwick last December.
They are five points ahead of fourth-placed Munster, two behind second-placed Leinster and six astern of leaders Connacht.
TUNCELy (CyHAN)- Some houses which were struck and took property damage by the bullets during the clashes, in which one police officer was killed while two others injured, which was broke out when terrorists of Kurdistan Workers' Party (PKK) attacked to armored vehicles protecting the police lodging, in astern Turkish province of Tunceli.
You feel you've been left all alone on Lindisfarne, Cut off by the tide that will never turn again, But truly there is hope one day the tide will turn, Somehow, somewhere love will again pull up astern.