from The American Heritage® Dictionary of the English Language, 4th Edition
- One and a half: sesquicentennial.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- One and a half
- In a ratio of 3 to 2
from the GNU version of the Collaborative International Dictionary of English
- A combining form (also used adjectively) denoting that three atoms or equivalents of the substance to the name of which it is prefixed are combined with two of some other element or radical.
from The Century Dictionary and Cyclopedia
- n. A Latin prefix, meaning ‘One half more’—that is, an amount equal to one and a half times some unit, as in sesquitone; or an amount equal to a unit plus some part of itself, as in sesquialtera, sesquitertia, etc.
Latin sēsqui- : sēmis, a half; see sēmi- in Indo-European roots + -que, and; see kwe in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin sēsqui (Wiktionary)