An opaque fast-drying liquid used to cover a mistake written or typed on a piece of paper.

(mechanics) The branch of mechanics dealing with gases and liquids, either at rest or in motion.

(medicine) A clear bodily fluid in the form of a very pure saline solution with microglia that occupies the subarachnoid space in the brain (between the skull and the cerebral cortex), and which acts as a cushion or buffer for the cortex.

The clear, colorless, viscous fluid that is secreted from an aroused penis before ejaculation.

plural of fluid ounce

Any of various units of volume used for liquid measure, all approximately 1.73–1.83 cubic inches or 28.4–30 milliliters.

(physics) A substance at a temperature and pressure above its own thermodynamic critical point that can diffuse through solids like a gas and dissolve materials like a liquid.

(humorous) A mythical automotive material used either in jokes or to gauge how inept someone is in basic auto mechanics.

fuel in fluid form used in a cigarette lighter

A white, opaque fluid, applied to paper to mask textual errors; used especially to mask errors in typing so that corrections may be overtyped.