aster

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noun as·ter \ˈas-tər\

Definition of aster

  1. 1 [New Latin, from Latin, aster, from Greek aster-, astēr star, aster — more at star] a :  any of various chiefly fall-blooming leafy-stemmed composite herbs (Aster and closely related genera) with often showy heads containing disk flowers or both disk and ray flowersb :  china aster

  2. 2 [New Latin, from Greek aster-, astēr] :  a system of microtubules arranged radially about a centriole at either end of the mitotic or meiotic spindle

Illustration of aster

First Known Use of aster

1664


-aster

noun suffix as·ter

Definition of -aster

  1. :  one that is inferior or not genuine criticaster

Origin and Etymology of -aster

Middle English, from Latin, suffix denoting partial resemblance


ASTER Defined for English Language Learners

aster

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noun

Definition of aster for English Language Learners

  • : a type of plant that is grown in gardens for its colorful flowers


ASTER Defined for Kids

aster

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noun as·ter \ˈa-stər\

Definition of aster for Students

  1. :  any of various herbs related to the daisies that have leafy stems and white, pink, purple, or yellow flower heads which bloom in the fall


Medical Dictionary

aster

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noun as·ter \ˈas-tər\

Medical Definition of aster

  1. :  a system of microtubules arranged in rays around a centriole at either end of the mitotic or meiotic spindle The first stage in the formation of the mitotic spindle in a typical animal cell is the appearance of microtubules in a “sunburst” arrangement, or aster, around each centrosome during early prophase.—Gerald Karp, Cell and Molecular Biology: Concepts and Experiments, 6th edition, 2010—called also cytaster

Illustration of aster



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