parasite
par-a-site · noun
Definitions
noun
- 1.
An organism that lives in or on another organism (its host) and benefits by deriving nutrients at the host's expense.
- 2.
A person who habitually relies on or exploits others without giving anything in return.
Forms
plural: parasites
Related words
Etymology
From Greek parasitos (one who eats at another's table), from para (beside) + sitos (food).