sesqui-

a combining form meaning “one and a half,” used in the formation of compound words:
sesquicentennial.

sesqui-

prefix

indicating one and a half
sesquicentennial
(in a chemical compound) indicating a ratio of two to three
sesquioxide

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Word History and Origins

< Latin sēsqui- < *sēm ( i ) sque, equivalent to sēmis half-unit, semis + -que and (cognate with Greek té, Sanskrit ca, Gothic -uh )

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Word History and Origins

Origin of sesqui-¹

from Latin, contraction of semi- + as as ² + -que and

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Example Sentences

At length it was discovered that sesqui-sulphide of phosphorus would make just as good matches and was harmless.

From Project Gutenberg

We may, for example, differentiate in this way the alkaline bicarbonates from the sesqui-carbonates or the carbonates.

From Project Gutenberg

Float the paper on a solution of the sesqui-chloride of iron.

From Project Gutenberg

Sesqui-, Latin for one and a half; so Sesquipedalis, a foot and a half long.

From Project Gutenberg

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