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To pierce; to pass into the deeper tissues or into a cavity.
Farlex Partner Medical Dictionary © Farlex 2012


verb To enter by force; to force one’s way into a place or space; to infiltrate.

verb To enter into the body—e.g., by a sharp object or projectile.

verb To enter a natural orifice (e.g., the vagina, anus), as by a penis or sexual toy.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


(pĕn′ĕ-trāt) [L. penetrare]
To enter or force into the interior; pierce.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
*** How deep UV light penetrates varies greatly among water bodies and regions.
Their bodies consist of a worm-like portion and 'roots' that house the bacteria and penetrate the bones, but they have no body parts mechanically able to drill through bone.
Sunlight is unable to penetrate the ocean's deep waters.
The company maintains that the new collection is formulated with a proprietary essential glucosamine complex that penetrates up to 10 surface layers, hydrates to allow rebuilding of the skin's collagen structure and reduces discolorations, resulting in luminous skin that appears lit from within.
Most Divine Spirit, enlighten and inflame me in meditating on the Passion of Jesus, help me to penetrate this mystery of love and suffering of a God, Who, clothed with our humanity, suffers, agonizes, and dies for the love of the creature!
Before Ulysses' tour, which takes it from Jupiter's neighborhood to far above the solar poles, most astronomers didn't think much dust from other stars could penetrate the solar system.
Super Skinny's Smoothing Complex penetrates deeply into the hair shaft, where it displaces water and constricts the hair.
Penetration is evaluated by simply breaking or cutting a coated dried core and observing how far the coating penetrates the core.
Water repellent preservatives contain wax or silicone plus other ingredients that penetrate the wood's surface and repel moisture.
"That's because air doesn't conduct heat well," says atmospheric scientist Peggy LeMone of the University Corporation for Atmospheric Research, Conduction occurs when energy transfers from one molecule to another, "and air spaces between dry sand grains work like insulation." So heat from sunlight on the surface can't penetrate deep into sand.
If it is placed too medially, it might penetrate the antral wall and enter the nasal cavity.