What does FF stand for?

Full Faced (pipe gasket)

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

Other Resources:

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Frosted Flakes (cereal) Frostfell (gaming, Asheron's Call) Frostfire (game) Frou Frou (band) Frozen Fire (German online-gaming clan) Frozen Fury (gaming clan) Fuchs Friends (online community) Fuel Fabrication Fuel Failure Fuel Flow		Full Floater (truck axle) Full Force (Jedi Knight game) Full Forward (Australian football position) Full Frame (photography) Full Funding Full-Fed (animal science) Fully Fashioned (nylon stockings) Fully Functional Fully Furnished Fulton Factor

Samples in periodicals archive:

While you can buy both helmets covering a part of your face and ones covering the entire face, and while both will protect you from the fatigue and the noise of the wind, the full faced one is more advisable since it will also prevent insects from entering the helmet.

New Trends and Styles in Motorcycle Helmets

For those who missed him, Gil was in the picture of George Thomas, full faced, fourth from the top of the boys and girls (right-hand side as you look at the picture).

Young Gil is in the picture

Today markets are filled with many types of helmets; the full faced helmet is the safest option and should be preferred over other types.

Motorcycle Helmets - A Primer