from The Century Dictionary.
- noun An English coin, first coined in gold by Edward III. in 1344. It was current for 3 shillings and weighed 54 grains.
Sorry, no etymologies found.
I gave him the half-florin, and was getting into my cab, when he came rambling up.
In payment I gave a half-florin -- worth rather less than a shilling of English money -- and I received in return quite a handful of silver and copper coins.