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pair US English

A set of two things used together or regarded as a unit

pair US Thesaurus

a pair of gloves

au pair US English

A young foreign person, typically a woman, who helps with housework or child care in exchange for room and board

base pair US English

A pair of complementary bases in a double-stranded nucleic acid molecule, consisting of a purine in one strand linked by hydrogen bonds to a pyrimidine in the other. Cytosine always pairs with guanine, and adenine with thymine (in DNA) or uracil (in RNA)

ion pair US English

Such a pair held together in a solution by electrostatic attraction.

lone pair US English

A pair of electrons occupying an orbital in an atom or molecule and not directly involved in bonding

pair-bond US English

(Of an animal or person) form a close relationship through courtship and sexual activity with one other animal or person

pair-case US English

A double case for a watch, consisting of an inner case containing the workings and a protective or decorative outer case.

pair-fed US English

(Of an animal) subjected to pair-feeding.

pair-feed US English

To feed two groups of (experimental animals) with a diet identical except for the item whose effects are being tested on one group.

pair-mate US English

To test the sexual compatibility of (experimental animals) by allowing mating within and between each of two groups; (also) to control the mating of (experimental animals) so that each male mates with only one female, or vice versa.

pair-oar US English

A boat rowed with two oars.

pair work US English

Learning in which students work in pairs, especially as a technique used in language teaching.

pit pair US English

A structure composed of two pits in adjacent cell walls, separated only by the pit membranes and often serving in the exchange of liquids and gases between cells.

Cooper pair US English

A loosely bound pair of electrons with opposite spins and moving with the same speed in opposite directions, held to be responsible for the phenomenon of superconductivity

happy pair US English

= happy couple.

pair-horse US English

Attributive Having, involving, intended for, or consisting of a pair of horses.

pair-mated US English

Subjected to pair-mating.

pair mating US English

The practice of pair-mating animals; an instance of this.

pair-oared US English

Of a boat: two-oared.

pair royal US English

A set of three playing cards of the same denomination. double pair-royal noun a set of four such cards.

pair trawl1 US English

A large trawl net dragged between two trawlers.

pair trawl2 US English

To fish using pair trawlers.

pigeon pair US English

A boy and girl as twins, or as the only children in a family

point pair US English

Two points considered together or forming a pair.

electron pair US English

Two electrons occupying the same orbital in an atom or molecule

matched pair US English

A pair of experimental subjects, one assigned to an experimental group and the other to a control group, selected to resemble each other in all properties except the one under investigation; frequently attributive (also in plural).

ordered pair US English

A pair of elements a, b having the property that (a, b) = (u, v) if and only if a = u, b = v

pair-feeding US English

The feeding of two groups of experimental animals with a diet identical except for the item whose effects are being tested on one group.

pair trawler US English

Each of a pair of trawlers which catch fish together by dragging a large trawl net between them.

pair trawling US English

The action or practice of fishing using pair trawlers.

twisted pair US English

A cable consisting of two wires twisted around each other, used especially for telephone or computer applications

adjacency pair US English

Two successive utterances by different speakers, where the second is a necessary or expected response to the first, as in an exchange of greetings.

pair-formation US English

The coming together of individual male and female animals in preparation for breeding.

pair production US English

The conversion of a radiation quantum into an electron and a positron

pair of hands US English

A person seen in terms of their participation in a task

post and pair US English

A card game in which players are dealt three cards on which they place bets.

carriage and pair US English

A four-wheeled passenger carriage pulled by two horses

pair of hands in pair US English

A person seen in terms of their participation in a task

pairs skating US English

A form of choreographed figure skating in which a man and a woman compete as a team

pair skating in pairs skating US English

A form of choreographed figure skating in which a man and a woman compete as a team

steps in step US English

A stepladder

tongs US English

An instrument with two movable arms that are joined at one end, used for picking up and holding things

a pair of bellows in bellows US English

A device with an air bag that emits a stream of air when squeezed together with two handles, used for blowing air into a fire

forceps US English

A pair of pincers or tweezers used in surgery or in a laboratory

pincer US English

A tool made of two pieces of metal bearing blunt concave jaws that are arranged like the blades of scissors, used for gripping and pulling things

pliers US English

Pincers with parallel, flat, and typically serrated surfaces, used chiefly for gripping small objects or bending wire

scale2 US English

An instrument for weighing. Scales were originally simple balances (pairs of scales) but are now usually devices with an internal weighing mechanism housed under a platform on which the thing to be weighed is placed, with a gauge or electronic display showing the weight

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