SESQUIL'TERAL, 1. In geometry, designating a ratio where one quantity or number contains another once, and half as much more; as 9 contains 6 and its half. 2. A sesquialteral floret, is when large fertile floret is accompanied with a small abortive one.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI