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Medical Dictionary

1

mask

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noun \ˈmask\

Medical Definition of mask

  1. 1:  a protective covering for the face

  2. 2a:  any of various devices that cover the mouth and nose and are used to prevent inhalation of dangerous substances, to facilitate delivery of a gas (as oxygen or a general anesthetic), or to prevent the dispersal of exhaled infective material—see gas mask, oxygen mask

  3. 3:  a cosmetic preparation for the skin of the face that produces a tightening effect as it dries




2

mask

transitive verb

Medical Definition of mask

  1. 1:  to prevent (an atom or group of atoms) from showing its ordinary reactions <to mask hydroxyl in a sugar by converting it into methoxyl>

  2. 2:  to modify or reduce the effect or activity of (as a process or a reaction)

  3. 3:  to make indistinct or imperceptible <flavorings used in pharmacy to mask the taste of medications>

  4. 4:  to raise the audibility threshold of (a sound) by the simultaneous presentation of another sound





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