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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 ?
* Frictional costs in California are the highest in the country.
"We are delighted to be unveiling this exchange that will cut frictional costs and allow brokers, reinsurance and insurance companies access to the capital markets using blockchain," said David Edwards, chief executive officer of ChainThat.
To comprehensively improve the performance of USM, advanced piezoelectric and frictional materials, optimal structure design, and precision driving control system need synergetic development.
Its angled contact surface creates a frictional connection in conjunction with angled die clamping edges.
Unexpected accidents are a result of wear and tear of the vehicle, complex designs of the vehicle, and frictional resistance.
These simulations revealed that an interface within the molecular structure exhibited a "frictional" resistance under sliding deformation.
The constraining force along the axial direction of the buried pipeline such as the pipeline-soil frictional force influences the pipeline-soil coordinating subsidence slightly and so can be neglected when analyzing the pipeline-soil coordinating bending deformation during surface subsidence.
Furthermore, the GFRTP wires had frictional and flexural properties similar to those of the Ni-Ti wires [2, 3].
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.
The frictional force is known as the opposing force when a surface slides over another surface.