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Webster 1913 Edition
Deleterious
Delˊe-te′ri-ous
,Adj.
 [LL. 
deleterius 
noxious, Gr. δηλητήριος
, fr. δηλεῖσθαι 
to hurt, damage; prob. akin to L. delere 
to destroy.] Hurtful; noxious; destructive; pernicious; 
– as, a 
deleterious 
plant or quality; a deleterious 
example. Delˊe-te′ri-ous-ly
, adv.
 Delˊe-te′ri-ous-ness
, Noun.
Webster 1828 Edition
Deleterious
DELETERIOUS
,Adj.
 1.
  Having the quality of destroying, or extinguishing life; destructive;poisonous; as a deleterious plant or quality.2.
  Injurious; pernicious.Definition 2025
deleterious
deleterious
English
Adjective
deleterious (comparative more deleterious, superlative most deleterious)
-  harmful often in a subtle or unexpected way (as for example deleterious effects, deleterious to health).
-  1850, Nathaniel Hawthorne, The Scarlet Letter – Chapter XV:
- Or might it suffice him, that every wholesome growth should be converted into something deleterious and malignant at his touch?
 
 
 -  1850, Nathaniel Hawthorne, The Scarlet Letter – Chapter XV:
 
Synonyms
- (harmful): destructive, harmful, hurtful, injurious, noxious, pernicious; see also Wikisaurus:harmful
 
Derived terms
Related terms
Translations
harmful