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Webster 1913 Edition
Rarefiable
Rar′e-fiˊa-ble
(răr′ē̍-fīˊȧ-b’l)
, Adj.
 [Cf. F. 
raréfiable
.] Capable of being rarefied. 
Boyle.
 Webster 1828 Edition
Rarefiable
RAR'EFIABLE
,Adj.
  Definition 2025
rarefiable
rarefiable
English
Adjective
rarefiable (not comparable)
-  Capable of being rarefied.
- (Can we find and add a quotation of Boyle to this entry?)