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MAS, mAs

milliampere second.


(măs′kū-lĭn) 1. Pert. to the male sex. 2. Having male characteristics. SYN: virile.


(măs″cū-lĭn″ĭ-zā-shŭn) 1. The normal development of secondary male sex characteristics that occur at puberty. 2. The abnormal development of masculine characteristics in the female. This may be caused by certain testosterone-producing tumors, medication that contains testosterone, or anabolic steroids. SEE: virilization.


(mā′zĕr) Acronym for microwave amplification by stimulation emission of radiation. It is a device that produces a small, nondiverging radiation beam. SEE: laser.


(mask) [Fr. masque, disguise] 1.A covering for the face that serves as a protective barrier. SEE: bag mask device; respirator. 2. The immobile appearance of the face occurring in certain pathological conditions. 3. To conceal or prevent detection. 4. A change in facial pigmentation resulting from pregnancy or from disease.

aerosol m. A mask used for the therapeutic administration of a nebulized solution, humidity, or high airflow with oxygen enrichment. It has a large-bore inlet and an exhalation port.

ecchymotic m. Cyanotic facies accompanying traumatic asphyxia.

face m. 1. A barrier device used in infection control to prevent health care providers from breathing or coughing on patients. It is also employed to prevent patients' sneezes and sputum from making contact with the health care provider's face or eyes or from being inhaled. 2. A device that covers the mouth, nose, or both of a patient who requires positive-pressure, noninvasive ventilation or continuous positive pressure-ventilation (CPAP).

high air flow with oxygen enrichment m. ABBR: HAFOE mask. A term applied to Venturi-type devices. SEE: Venturi mask.

Hutchinson m. SEE: under Hutchinson, Sir Jonathan.

luetic m. Blotchy brown pigmentation of cheeks, forehead, and temples, seen in tertiary syphilis.

Mikulicz m. SEE: under Mikulicz-Radecki, Johann von.

N95 m. N95 respirator.

nonrebreathing m. An oxygen administration device with one-way valves for inspiration and expiration and a reservoir bag, used to attain high concentrations of oxygen.

oxygen m. A device that fits over the mouth and nose and provides oxygen or other therapeutic gas. It includes a simple, partial rebreathing type and a nonrebreathing type.

Parkinson m. A colloquialism for Parkinson facies.

pocket face m. A folding mask that can be carried in a pocket and used for artificial ventilation. Most pocket face masks have an inlet for oxygen and a one-way valve for infection control.

m. of pregnancy Chloasma gravidarum.

surgical m. A single-use filtration device made ...

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