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1. The anterior part of the integument of soft ticks (family Argasidae) that extends over the capitulum and forms the roof of the camerostome.
2. An expanded, covering structure that resembles the hood of robe or cloak in shape or function, such as the extensor digital expansions that overly the dorsal aspect of the heads of the metacarpals.
[O.E. hōd, hat]

hor·i·zon·tal lam·i·nar flow hood

(hōr'i-zon'tăl lam'i-năr' flō hud)
A laminar flow hood in which the air is pushed through a filter horizontally toward the user to maintain a sterile environment.

lam·i·nar flow hood

(lam'i-năr flō hud)
An enclosure in which air flow is directed so as to prevent contamination of sterile materials by airborne organisms.
Synonym(s): hood.

ver·ti·cal lam·in·ar flow hood

(vĕr'ti-kăl lam'i-năr flō hud)
A laminar flow hood in which the air is pushed through a filter vertically to protect the user from exposure to harmful materials.


an item of horse clothing. A cloth cover for the head; with eye and ear holes.

long hood
covers the head and neck to the shoulders.
References in classic literature ?
And thus it was that Robin Hood became outlawed; thus a band of merry companions gathered about him, and thus he gained his right-hand man, Little John; and so the prologue ends.
Morgan has invested more than $24 million to help Robin Hood improve the lives of struggling New Yorkers.
This hood is maybe hundreds of years old," said Shahid Ali, another Pakistani falconer, displaying an antique hood in his collection.
tv/videos/150232050) on Twitch yesterday to fully show off the Red Hood in action in "Injustice 2.
High-performance fume hoods take on different names throughout the industry, and therefore the meaning of the term "high-performance fume hood" is often misunderstood.
Constantly challenged with energy conservation, engineers realized that laboratory hoods with horizontal sliding sash on a double track have half the open face area of a vertical sash hood of the same size.
The hood entry is available in one or more top & side entries and a closed enclosure that can be drilled.
Both models are available in 30- and 36-inch widths (flat-glass canopy models PVW7301SJSS and PVW7361SJSS, and full stainless steel hood models PVW7302SJSS and PVW7362SJSS) and retail for an MSRP of $550 $600.
The old hood came out easily, but while I was putting in the new hood, the clamp I used to hold it in position slipped.
The most commonly used fume hood type is the ducted hood and its derivatives.
Plus they could have some earphones in, and they can't hear us, and if they have a hood up, we can't see that.
A hood might resemble blinkers with the eye cowls cut out but performs an altogether different role to blinds as it does not impair vision, it blocks out noise.