- one and a half: sesquicentennial
- Chem. containing two atoms of one radical or element combined with three of another: sesquicarbonate
Origin of sesqui-L, more by a half ; from semis, half (; from semi-: see semi-) + -que, and ; from Indo-European an unverified form kwe (enclitic) from source Sanskrit ca, Classical Greek te, Old Irish -ch, Gothic -h
One and a half: sesquicentennial.
Origin of sesqui-Latin s&emacron;squi- : s&emacron;mis, a half; see s&emacron;mi- in Indo-European roots + -que, and; see kwe in Indo-European roots.