A unit of time equal to 0.000 000 000 000 001 seconds (i.e. 1×10⁻¹⁵ seconds) and with symbol fs.

Belonging to, or proceeding from, angels; resembling, characteristic of, or partaking of the nature of, an angel. / Very sweet-natured or well-behaved. / (chemistry) Of or pertaining to angelic acid.

(logic) A statement Q in relation to statement P such that P implies Q.

plural of buffo