Twin : adj
1: being two identical [syn: duplicate, matching, twin(a),
twinned]
2: very similar [syn: siamese]
(noun)
1: either of two offspring born at the same time from the same
pregnancy
2: (astrology) a person who is born while the sun in in Gemini
[syn: Gemini, Twin]
3: a waterfall in the Snake River in southern Idaho [syn: Twin,
Twin Falls]
4: a duplicate copy [syn: counterpart, similitude]
(verb)
1: duplicate or match; "The polished surface twinned his face
and chest in reverse" [syn: duplicate, parallel]
2: bring two objects, ideas, or people together; "This fact is
coupled to the other one"; "Matchmaker, can you match my
daughter with a nice young man?"; "The student was paired
with a partner for collaboration on the project" [syn: match,
mate, couple, pair]
3: grow as twins; "twin crystals"
4: give birth to twins
Based on WordNet 2.0
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Twin : \Twin\, a. [OE. twin double, AS. getwinne two and two, pl.,
twins; akin to D. tweeling a twin, G. zwilling, OHG.
zwiniling, Icel. tvennr, tvinnr, two and two, twin, and to
AS. twi- two. See Twice, Two.]
1. Being one of two born at a birth; as, a twin brother or
sister.
2. Being one of a pair much resembling one another; standing
the relation of a twin to something else; -- often
followed by to or with. --Shak.
3. (Bot.) Double; consisting of two similar and corresponding
parts.
4. (Crystallog.) Composed of parts united according to some
definite law of twinning. See Twin, n., 4.
Twin boat, or Twin ship (Naut.), a vessel whose deck and
upper works rest on two parallel hulls.
Twin crystal. See Twin, n., 4.
Twin flower (Bot.), a delicate evergreen plant ({Linn[ae]a
borealis) of northern climates, which has pretty,
fragrant, pendulous flowers borne in pairs on a slender
stalk.
Twin-screw steamer, a steam vessel propelled by two screws,
one on either side of the plane of the keel.
Based on Webster's Revised Unabridged Dictionary
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Twin : \Twin\, v. i. [imp. & p. p. Twinned; p. pr. & vb. n.
Twinning.]
1. To bring forth twins. --Tusser.
2. To be born at the same birth. --Shak.
Based on Webster's Revised Unabridged Dictionary
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Twin : \Twin\, v. t.
1. To cause to be twins, or like twins in any way. --Shak.
Still we moved Together, twinned, as horse's ear and
eye. --Tennyson.
2. To separate into two parts; to part; to divide; hence, to
remove; also, to strip; to rob. [Obs.]
The life out of her body for to twin. --Chaucer.
Based on Webster's Revised Unabridged Dictionary
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Twin : \Twin\, n.
1. One of two produced at a birth, especially by an animal
that ordinarily brings forth but one at a birth; -- used
chiefly in the plural, and applied to the young of beasts
as well as to human young.
2. pl. (Astron.) A sign and constellation of the zodiac;
Gemini. See Gemini.
3. A person or thing that closely resembles another.
4. (Crystallog.) A compound crystal composed of two or more
crystals, or parts of crystals, in reversed position with
reference to each other.
Note: The relative position of the parts of a twin may be
explained by supposing one part to be revolved 180[deg]
about a certain axis (called the twinning axis), this
axis being normal to a plane (called the twinning
plane) which is usually one of the fundamental planes
of the crystal. This revolution brings the two parts
into parallel position, or vice versa. A contact twin
is one in which the parts are united by a plane
surface, called the composition face, which is usually
the same as the twinning plane. A penetration twin is
one in which the parts interpenetrate each other, often
very irregularly. Twins are also called, according to
form, cruciform, geniculated, etc.
Based on Webster's Revised Unabridged Dictionary
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Twin : \Twin\, v. i.
To depart from a place or thing. [Obs.] ``Ere that we farther
twin.'' --Chaucer.
Based on Webster's Revised Unabridged Dictionary
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Twin : Twin: One of two children produced in the same pregnancy and born during the same birth process.
Twins can develop from one ovum (egg) or from two ova (eggs): - Twins from one ovum: Twins that develop from a single ovum are called monozygotic. They are said to identical
twins and have identical genomes.
- Twins from two ova: Twins that develop from two ova that are fertilized at the same time are called dizygotic. They are nonidentical twins and
have different genomes.
The term "fraternal" is often applied to nonidentical twins but it may be misleading. Nonidentical twins can be of the same sex (two brothers or two sisters) or of different sex (brother and
sister). The better term is "nonidentical."
Based on Webster's Revised Unabridged Dictionary (1913)
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