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The Collaborative International Dictionary of English v.0.48 (gcide)

Hair \Hair\ (h[^a]r), n. [OE. her, heer, h[ae]r, AS. h[=ae]r;
akin to OFries. h[=e]r, D. & G. haar, OHG. & Icel. h[=a]r,
Dan. haar, Sw. h[*a]r; cf. Lith. kasa.]
1. The collection or mass of filaments growing from the skin
of an animal, and forming a covering for a part of the
head or for any part or the whole of the body.
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2. One the above-mentioned filaments, consisting, in
vertebrate animals, of a long, tubular part which is free
and flexible, and a bulbous root imbedded in the skin.
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Then read he me how Sampson lost his hairs.
--Chaucer.
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And draweth new delights with hoary hairs.
--Spenser.
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3. Hair (human or animal) used for various purposes; as, hair
for stuffing cushions.
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4. (Zool.) A slender outgrowth from the chitinous cuticle of
insects, spiders, crustaceans, and other invertebrates.
Such hairs are totally unlike those of vertebrates in
structure, composition, and mode of growth.
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5. (Bot.) An outgrowth of the epidermis, consisting of one or
of several cells, whether pointed, hooked, knobbed, or
stellated. Internal hairs occur in the flower stalk of the
yellow frog lily ({Nuphar}).
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6. A spring device used in a hair-trigger firearm.
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7. A haircloth. [Obs.] --Chaucer.
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8. Any very small distance, or degree; a hairbreadth.
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Note: Hairs is often used adjectively or in combination; as,
hairbrush or hair brush, hair dye, hair oil, hairpin,
hair powder, a brush, a dye, etc., for the hair.
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{Against the hair}, in a rough and disagreeable manner;
against the grain. [Obs.] "You go against the hair of your
professions." --Shak.

{Hair bracket} (Ship Carp.), a molding which comes in at the
back of, or runs aft from, the figurehead.

{Hair cells} (Anat.), cells with hairlike processes in the
sensory epithelium of certain parts of the internal ear.


{Hair compass}, {Hair divider}, a compass or divider capable
of delicate adjustment by means of a screw.

{Hair glove}, a glove of horsehair for rubbing the skin.

{Hair lace}, a netted fillet for tying up the hair of the
head. --Swift.

{Hair line}, a line made of hair; a very slender line.

{Hair moth} (Zool.), any moth which destroys goods made of
hair, esp. {Tinea biselliella}.

{Hair pencil}, a brush or pencil made of fine hair, for
painting; -- generally called by the name of the hair
used; as, a camel's hair pencil, a sable's hair pencil,
etc.

{Hair plate}, an iron plate forming the back of the hearth of
a bloomery fire.

{Hair powder}, a white perfumed powder, as of flour or
starch, formerly much used for sprinkling on the hair of
the head, or on wigs.

{Hair seal} (Zool.), any one of several species of eared
seals which do not produce fur; a sea lion.

{Hair seating}, haircloth for seats of chairs, etc.

{Hair shirt}, a shirt, or a band for the loins, made of
horsehair, and worn as a penance.

{Hair sieve}, a strainer with a haircloth bottom.

{Hair snake}. See {Gordius}.

{Hair space} (Printing), the thinnest metal space used in
lines of type.

{Hair stroke}, a delicate stroke in writing.

{Hair trigger}, a trigger so constructed as to discharge a
firearm by a very slight pressure, as by the touch of a
hair. --Farrow.

{Not worth a hair}, of no value.

{To a hair}, with the nicest distinction.

{To split hairs}, to make distinctions of useless nicety.
[1913 Webster] hairball