(inorganic chemistry) Any anion derived from beryllate by replacing an oxygen atom with two of fluorine, but especially the anion BF₄²⁻; any salt containing such an anion

plural of phytoregulator

Initialism of time of flight. / (medicine) Initialism of tetralogy of Fallot.

once every two months; bimestrially / Twice every month; semimonthly.