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a diminutive or pejorative suffix denoting something that imperfectly resembles or mimics the true thing:
criticaster; poetaster, oleaster.
Origin of -aster1
From Latin


Chiefly Biology. a combining form with the meaning “star,” used in the formation of compound words:
< Greek astḗr star; cf. astro- Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for -aster


a person or thing that is inferior or bears only a poor resemblance to what is specified: poetaster
Word Origin
from Latin: suffix indicating imperfect resemblance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for -aster

word-forming element expressing incomplete resemblance (e.g. poetaster), usually diminutive and deprecatory, from Latin, from Greek -aster, suffix originally forming nouns from verbs ending in -azein, later generalized as a pejorative suffix, e.g. Greek patraster "he who plays the father."

Online Etymology Dictionary, © 2010 Douglas Harper
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