Definify.com
Webster 1913 Edition
Poisonous
Poi′son-ous
,Adj.
Having the qualities or effects of poison; venomous; baneful; corrupting; noxious.
Shak.
– Poi′son-ous-ly
, adv.
Poi′son-ous-ness
, Noun.
Webster 1828 Edition
Poisonous
POIS'ONOUS
,Adj.