exotoxin

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exotoxin

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Etymology tree

Proto-Indo-European *h₁éǵʰ

Proto-Indo-European *-s

Proto-Indo-European *h₁eǵʰs

Proto-Hellenic *eks

Ancient Greek ἐκ (ek)

Ancient Greek ἔξω (éxō)der.

English exo-

Iraniander.?

Ancient Greek τόξον (tóxon)

Proto-Indo-European *-kos

Proto-Hellenic *-kos

Ancient Greek -κός (-kós)

Ancient Greek -ῐκός (-ĭkós)

Ancient Greek τοξῐκός (toxĭkós)

Ancient Greek τοξικόν (toxikón)der.

Latin toxicum

Proto-Indo-European *-nós

Proto-Indo-European *-iHnos

Proto-Italic *-īnos

Latin -īnusder.

Old French -inbor.

Middle English -in

English -ineclip.

English -in

English toxin

English exotoxin

From exo- + toxin.

exotoxin (plural exotoxins)

any toxin secreted by a microorganism into surrounding environment