2. A garment or article consisting of two matching or identical parts joined together.
3. Two people who are doing something together, or who are considered together because there is some connection between them.
4. Etymology: "two of a kind, coupled in use", from Old French paire, from Latin paria, "equals"; from par, "a pair, counterpart, equal", a noun use of the adjective form of par, "equal".
The new pair of shoes had buckles on the toes.
An extra pair of hands is just what Rosetta needed to get the work done.
2. A partnership of two often engaged in a competition against another partnership of two: Our champion pair of tennis players easily defeated the challenging pair from the other club.3. Two animals that mate together: A pair of parrots can raise one chick each year.
Steve used the clippers to pare his fingernails.
2. To remove the outer covering or skin of fruit with a knife or similar instrument: Jennifer used the cutting tool to pare or to peel the apples before she made the apple pie.Having a sweet and juicy pear is a real delight.
When the phone rang, Jill was busy trying to pare a pear; in fact, she was thinking about making it a pair for her afternoon snack.
2. A pair of valence electrons that form a non-polar bond between two neighboring atoms.
2. A chemical bond between two atoms of the same or different elements, in which each atom contributes one electron to be shared in a pair.
2. A positive ion and an equal-charge negative ion, usually an electron, that are produced by the action of radiation on a neutral atom or molecule.
3. A pair of ions of equal and opposite charge formed by photoionization or by the interaction of matter with any sufficiently energetic particles; such as, beta particles or alpha particles.
An ion pair, in the context of chemistry, consists of a positive ion and a negative ion temporarily bonded together by the electrostatic force of attraction between them.
Ion pairs occur in concentrated solutions of electrolytes (substances that conduct electricity when dissolved or molten).
Thus, in concentrated solutions of sodium chloride, some positive sodium ions, Na+, and some negative chloride ions, Cl-, are paired together.
Upon colliding, two oppositely charged ions stay together only for a short period of time. On the average, a certain population of these pairs exists at any given time, although the formation and dissociation of ion-pairs is continuous.