1.  aster(n = noun.plant) - any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers;
is a kind of flower
is a member of genus aster
has particulars: wood aster, aster acuminatus, whorled aster, aster arenosus, heath aster, aster dumosus, bushy aster, aster ericoides, heath aster, aster falcatus, white prairie aster, aster linarifolius, stiff aster, aster linosyris, goldilocks, goldilocks aster, linosyris vulgaris, aster novae-angliae, new england aster, aster novi-belgii, michaelmas daisy, new york aster, aster ptarmicoides, upland white aster, aster shortii, short's aster, aster tripolium, sea aster, sea starwort, aster turbinellis, prairie aster, annual salt-marsh aster, aromatic aster, arrow leaved aster, azure aster, bog aster, crooked-stemmed aster, eastern silvery aster, flat-topped white aster, late purple aster, panicled aster, perennial salt marsh aster, purple-stemmed aster, rough-leaved aster, rush aster, schreiber's aster, small white aster, smooth aster, southern aster, calico aster, starved aster, tradescant's aster, wavy-leaved aster, western silvery aster, willow aster

2.  aster(n = noun.body) - star-shaped structure formed in the cytoplasm of a cell having fibers like rays that surround the centrosome during mitosis;
is a kind of anatomical structure, bodily structure, body structure, complex body part, structure

1.  A genus of herbs with compound white or bluish flowers; starwort; Michaelmas daisy. [1913 Webster]

2.  A plant of the genus Callistephus. Many varieties (called China asters, German asters, etc.) are cultivated for their handsome compound flowers. [1913 Webster]

3.  A star-shaped figure of achromatic substance found chiefly in cells dividing by mitosis. [Webster 1913 Suppl.]

aster, n. any composite plant of the genus Aster, with bright daisy-like flowers, e.g. the Michaelmas daisy.

Idiom:
China aster a related plant, Callistephus chinensis, cultivated for its bright and showy flowers.

Etymology:
L f. Gk aster star

annual salt-marsh aster, aromatic aster, arrow leaved aster, aster acuminatus, aster arenosus, aster cordifolius, aster divaricatus, aster dumosus, aster ericoides, aster falcatus, aster family, aster linarifolius, aster linosyris, aster macrophyllus, aster novae-angliae, aster novi-belgii, aster ptarmicoides, aster shortii, aster tripolium, aster turbinellis, azure aster, beach aster, bog aster, bushy aster, calico aster, china aster, cornflower aster, crooked-stemmed aster, eastern silvery aster, flat-topped white aster, genus aster, golden aster, goldilocks aster, grass-leaved golden aster, hairy golden aster, heart-leaved aster, heath aster, large-leaved aster, late purple aster, maryland golden aster, mojave aster, narrow-leaved white-topped aster, new england aster, new york aster, panicled aster, perennial salt marsh aster, prairie aster, prairie golden aster, purple-stemmed aster, rough-leaved aster, rush aster, schreiber's aster, sea aster, short's aster, sickleweed golden aster, small white aster, smooth aster, southern aster, starved aster, sticky aster, stiff aster, stokes' aster, tansy leaf aster, tradescant's aster, upland white aster, wavy-leaved aster, western silvery aster, white prairie aster, white wood aster, white-topped aster, whorled aster, willow aster, wood aster