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1. The rubbing of one object or surface against another.
2. Conflict, as between persons having dissimilar ideas or interests; clash.
3. Physics A force that resists the relative motion or tendency to such motion of two bodies or substances in contact.

[Latin frictiō, frictiōn-, from frictus, past participle of fricāre, to rub.]

fric′tion·al adj.
fric′tion·al·ly adv.


(ˈfrɪk ʃə nl)

1. pertaining to or of friction.
2. moved or produced by friction.
fric′tion•al•ly, adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.frictional - pertaining to or worked or produced by friction; "frictional electricity"; "frictional heat"; "frictional gearing"
References in periodicals archive ?
Remember the basic principle of solids feeding: In order for the polymer particles to flow forward, the material must have less frictional drag on the screw than on the barrel.
The space needed to service market friction is generally referred to as frictional vacancy.
Contract notice: Measurement of frictional ability of running surfaces with scrimtex or equivalent in 2017-2020.
The frictional force is known as the opposing force when a surface slides over another surface.
In fact, the brake was locked and continued driving, eventually caused frictional heating and a fire.
Both toolboxes have inertia, but the one with rollers will experience trivial frictional forces against the floor.
To our knowledge, only a few attempts have been made to calculate frictional or wall slip heating in the flow of polymer melts.
Dutch firm Royal DSM has launched an innovative new high-performance material that reduces frictional torque in automobile engine timing systems.
The major finding was that the manner in which each lab measured slip displacement contributed to the greatest variability in frictional coefficient results.
Smooth, quiet, efficient operation is the result, as well as decreased energy use because of the reduction of frictional drag on electric motors.
What are the actual cooling temperatures governing heat transfer, in the presence of variable frictional heating along the wing chord of a 777 at Mach 0.
The EL 24 also is said to offer better frictional resistance and compression behavior than conventional elastomer feed rollers.