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Definition of aster

aster

/ˈæs.tər/
as · ter
Plural:asters
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aster Lexical Profile

• noun

1

A plant of the daisy family (Asteraceae), typically bearing bright, star-shaped flowers with yellow centers, native primarily to Eurasia and North America.

Example

"We planted a vibrant border of purple asters that bloomed beautifully in the late summer garden."

2

A star-shaped cellular structure consisting of a centrosome and its associated microtubules during the early stages of mitosis in an animal cell.

Example

"During cell division, the aster helps position the spindle apparatus to ensure that chromosomes separate correctly into the daughter cells."

Synonyms
View all synonyms for aster

• Rhymes for aster

• Nearby Words

assuredness
asswipe
astana
aster
asterisk
astern
asteroid

Word Origin & Etymology

From Latin 'aster' (star), borrowed from Ancient Greek 'ἀστήρ' (astḗr, 'star'), named for the radiating, star-like shape of the flower's petals.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Aster. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/aster
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