13-Letter Words Containing: _,_,F,I,I,N,O,R

• express as a formula

• (mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression

• the act of making formal (as by stating formal rules governing classes of expressions)

• To separate into parts or fractions; to fractionate

• creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant

• making fertile as by applying fertilizer or manure