ectoparasitic

/ˌɛktəˌpɛrəˈsɪtɪk/
adjective
  1. Relating to or characteristic of a parasite that lives on the outside of a host's body.
    • The researcher studied the ectoparasitic relationship between ticks and deer.
    • Ectoparasitic infections are common in stray animals that lack proper grooming.
    • The bird's ectoparasitic mites caused it to lose feathers.
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