face mask

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face′ mask`

or face′mask`,

any of various devices to shield the face, sometimes attached to or forming part of a helmet, as that worn in a hazardous activity or a sport.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.face mask - mask that provides a protective covering for the face in such sports as baseball or football or hockeyface mask - mask that provides a protective covering for the face in such sports as baseball or football or hockey
catcher's mask - a mask to protect the face of the catcher in baseball
face guard - face mask consisting of a strong wire mesh on the front of football helmets
fencer's mask, fencing mask - a face mask made of fine mesh that is worn over a fencer's face
mask - a protective covering worn over the face
ski mask - a woolen face mask to protect the face from cold while skiing on snow
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

face mask

V. mask.
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
* Wearing a National Institute for Occupational Safety and Health (NIOSH)-rated N95 filter mask when mowing the lawn or doing other chores outdoors, and taking appropriate allergy medication beforehand.
Short-focal-length eyepieces that provide high powers generally have small lenses that make the installation of a filter mask more challenging.
When outdoors, wear a filter mask. When driving, keep windows completely closed and, when you return home, remove your shoes and jacket before going inside, as you do not want to bring any pollen into your dwelling.
Owner and managing director David White commented, "It worked well enough for many years, but I was never really comfortable with the potential health risks to our staff, even though they wore a charcoal filter mask and gloves.
Further, the Gabor filter can be improved by tuning its parameters such as number of scales, orientation and filter mask size.
And if you have to mow the lawn, consider wearing a filter mask. If you regularly mow it, the grasses won't have a chance to flower anyway.
Then the 1D Gaussian filtering process is carried out at the pixel by using the stick as the filter mask. After filtering, the intensity along the curve becomes more coherent, while the intensity contrast across the curve is increased.
* Each bit can be set to 'filtered' or 'don't care' condition via filter mask
"No one warned us that there was a potential hazard with asbestos or told us to wear a HEPA filter mask or even a simple face maslc," he says.
In the spatial domain, this is carried out by replacing the value of each pixel in an image by the weighted average of the intensity levels in the neighborhood defined by the filter mask. The filter mask has component values defined by the Gaussian function and its width [sigma].
where H--generated matched filter mask with coordinates u, v; [sigma]--a standard deviation of Gaussian curve; m--mean value of the filter mask; [phi] (0 [less than or equal to] [phi] [less than or equal to] [pi])--mask rotation angle.
He donned a filter mask and entered the tank to rescue his shipmate.