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Penetrating; piercing: a penetrant wind.
Something that penetrates or is capable of penetrating.


sharp; penetrating
1. (Chemistry) chem a substance that lowers the surface tension of a liquid and thus causes it to penetrate or be absorbed more easily
2. a person or thing that penetrates


(ˈpɛn ɪ trənt)

1. a person or thing that penetrates.
2. a lotion, cream, etc., that penetrates the skin.
[1535–45; < Latin penetrant- (s. of penetrāns), present participle of penetrāre to penetrate; see -ant]
References in periodicals archive ?
Rust penetrants contain a solvent to dissolve rust, a lubricant to reduce friction and a surface tension reducer to get deep penetration.
Experimental results of sorption (S) and diffusion (D) along with the activation energy values are presented to achieve a better understanding of the resistivity of the PUs to the chosen penetrants.
Dylon Grade E-1626 is a combination of builders, detergents, anionic and non-ionic surfactants and penetrants that safely and completely loosen and wash away oils, waxes, silicon and sludgesk.
Specifically, the new handbook, contains information on applications of liquid penetrants such as filtered particle inspection of aerospace composites and quality control of down hole oil tubular assemblies.
Where cracks are not pronounced, silane- and silene-based penetrants can provide a proper measure of protection for these surfaces.
These new agricultural adjuvants offer increased hydrolytic stability to pesticide formulators, providing the opportunity to incorporate the performance and efficacy advantages of silicone spreaders and penetrants into "in-can" products.
Two types of penetrants - visible and fluorescent - are used.
The existence of a continuous, monotonic dependence of glassy state diffusivity on the van der Waals molecular volume of penetrants was first demonstrated for data on PVC (7): Diffusivities of gases and vapors, from helium to hexane, fell on a single semilogarithmic curve covering nearly ten orders of magnitude from [10.
A similar trend was reported by Gent and Tobias (14) and by Mark and Zhang (15) for similar PDMS liquid penetrants.
These include looking for the first bubble as the sample solidifies, measuring the specific gravity of the solidified sample, visual examination, use of dye penetrants, etc.
a subsidiary of Affiliated Resources Corporation, produces and packages a full line of automotive aftermarket fluids, such as refrigerants, lubricants and penetrants, fuel treatments and additives, cooling system, brake system and power steering products, cleaners and solvents, as well as appearance and emergency products.