4-Letter Words Starting: FLU

• the rate of flow of energy or particles across a given surface

• a flow or discharge

• a substance added to molten metals to bond with impurities that can then be readily removed

• excessive discharge of liquid from a cavity or organ (as in watery diarrhea)

• a state of uncertainty about what should be done (usually following some important event) preceding the establishment of a new direction of action

• the lines of force surrounding a permanent magnet or a moving charged particle

• (physics) the number of changes in energy flow across a given surface per unit area

• in constant change

• move or progress freely as if in a stream

• become liquid or fluid when heated

• mix together different elements

• an embarrassing mistake

• make a mess of, destroy or ruin

• flat bladelike projection on the arm of an anchor

• organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip

• a conduit to carry off smoke

• an acute febrile highly contagious viral disease