-aster

-aster

1
a diminutive or pejorative suffix denoting something that imperfectly resembles or mimics the true thing: criticaster; poetaster, oleaster.

Origin:
< Latin

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-aster

2
Chiefly Biology. a combining form with the meaning “star,” used in the formation of compound words: diaster.

Origin:
< Greek astḗr star; cf. astro-

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
-aster
 
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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Etymonline
Word Origin & History

-aster
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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