A quantitative metric that measures how well a particular mask or respirator fits to a specific individual's face, defined as the ratio of the ambient concentration of aerosol particles to the concentration within the facepiece during use.

(philosophy) Of or relating to factiality.

(retail, manufacturing) A retail item that, through minor fault of manufacture, is sold to the public for a reduced rate.

plural of factory second

past participle of get to the fireworks factory

(aviation) The acceleration experienced by an aircraft along a given axis at a particular instant in time.

Synonym of you don't dip your pen in company ink

present participle of send to the glue factory

simple past tense and past participle of send to the glue factory

Third-person singular simple present indicative form of send to the glue factory