any composite plant of the genus Aster, having rays varying from white or pink to blue around a yellow disk.
a plant of some allied genus, as the China aster.
Cell Biology. a structure formed in a cell during mitosis, composed of astral rays radiating about the centrosome.
Furniture. sunflower ( def 2 ).

1595–1605; < Latin < Greek astḗr star Unabridged


a diminutive or pejorative suffix denoting something that imperfectly resembles or mimics the true thing: criticaster; poetaster, oleaster.

< Latin


Chiefly Biology. a combining form with the meaning “star,” used in the formation of compound words: diaster.

< Greek astḗr star; cf. astro- Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
aster (ˈæstə)
1.  Compare golden aster any plant of the genus Aster, having white, blue, purple, or pink daisy-like flowers: family Asteraceae (composites)
2.  China aster a related Chinese plant, Callistephus chinensis, widely cultivated for its showy brightly coloured flowers
3.  cytology a group of radiating microtubules that surrounds the centrosome before and during mitosis
[C18: from New Latin, from Latin aster star, from Greek]

suffix forming nouns
a person or thing that is inferior or bears only a poor resemblance to what is specified: poetaster
[from Latin: suffix indicating imperfect resemblance]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

flower genus, 1706, from L. aster "star" (see star); so called for the radiate heads of the flowers.

suffix expressing incomplete resemblance (e.g. poetaster), usually dim. and deprecatory, from L., from Gk. -aster, suffix originally forming nouns from verbs ending in -azein, later generalized as a pejorative suffix, e.g. patraster "he who plays the father."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

aster as·ter (ās'tər)
See astrosphere.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Kick a pile of fallen leaves beside a path in the park and a wild aster pops up.
Images for aster
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