parasitic /ˌperəˈsɪtɪk/ adjective Learner's definition of PARASITIC
1
of an animal or plant : living in or on another animal or plant and getting food or protection from it寄生的；依附性的 2
always used before a noun : caused by a parasite寄生物引起的 3
disapproving : getting food, money, etc., from other people without doing anything to earn it or deserve it寄生虫似的；依赖他人的