Dictionary

sesqui-

combining form

Definition of SESQUI-

1
:  one and a half times <sesquicentennial>
2
:  containing half again as many atoms <sesquiterpene>
3
:  intermediate :  combination <sesquicarbonate>
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Origin of SESQUI-

Latin, one and a half, half again, literally, and a half, from semis half of an as, one half (probably from semi- + as as) + -que (enclitic) and; akin to Greek te and, Sanskrit ca, Gothic -h, -uh

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