the.com/parasitoid

A parasite that doesn't stop at feeding on its host: it grows inside it until the host dies.

means An insect (often a wasp) whose larvae develop inside or on a host organism and ultimately kill it — unlike a true parasite, which prefers its host alive.

from Coined in the early 20th century from 'parasite' (Greek 'parasitos,' literally 'one who eats at another's table,' from 'para-' beside + 'sitos' food/grain) plus the suffix '-oid,' meaning 'resembling' or 'like.' So, quite literally, a word built to mean 'parasite-like, but not quite' — a biologist's careful hedge for a creature that breaks the usual parasite rules by leaving its host dead rather than merely fed upon.

vs parasite
true parasites let the host live
larval lifestyle
eats host alive from inside, saving vitals for last
real-world fame
inspired the chestburster scene in Alien
ecology role
wasps use them as living pest control
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