hood

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hood

(hud),
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.

hood

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 periodicals archive ?
For instance, the model found that if the front opening of the smoke hood is too large relative to the cross-sectional area of the flue, then gases can escape under the lip of the hood.
The difficulty with smoke hoods is that it would take time for people to put them on in an emergency.
The point is that ignoring what they cost, smoke hoods aren't a free ride otherwise.
Mr Hart Davis visited households in Kenya affected by smoke from cooking fires and looked at simple, low-cost solutions developed by Practical Action such as smoke hoods which can reduce fumes by around 75 per cent.
Practical Action, in Bourton on Dunsmore, near Rugby, advocates the use of cheap and simple smoke hoods which reduce smoke by 75 per cent.
Prison officers used a misting machine to put the fire out and then entered the cell wearing protective smoke hoods.
The primary concern can be carbon monoxide, which better smoke hoods convert to carbon dioxide through a catalytic process.
The fire on the Mediterranean-bound plane led to a demand for passengers to be given smoke hoods on planes.
Each kit contains a helmet, two smoke hoods, two fire tunics, leggings, two pairs of boots and gloves.
The blaze involved plastic items creating "toxicity and smoke" and officers had to don protective smoke hoods.