deleterious [del-i-teer-ee-uh s]
1. injurious to health: deleterious gases.
2. harmful; injurious: deleterious influences.
2. pernicious, hurtful, destructive; noxious.
Origin: 1635-45; < Greek dēlētḗrios destructive, adj. derivative of dēlētḗr destroyer, equivalent to dēlē- variant stem of dēleîsthai to hurt, injure + -tēr agent suffix + -ios adj. suffix; see -ious
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