transposition

1. 1. The act or an instance of transposing.
   2. The state of being transposed.
2. Something transposed.
3. Genetics. Transfer of a segment of DNA to a new position on the same or another chromosome or plasmid.

noun

1. The act of exchanging or substituting: change, commutation, exchange, interchange, shift, substitution, switch, trade. Informal swap. See change/persist, substitute.
2. The act of changing or being changed from one position, direction, or course to the opposite: inversion, reversal, turnabout, turnaround. See change/persist.

The notation or performance of music at a pitch different from that in which it was originally conceived, by raising or lowering all the notes by the same interval.

Term sometimes used in logic for the transformation usually known as contraposition, whereby from (p → q) we can derive (¬q → ¬p).

Displacement to the opposite side; in genetics, the nonreciprocal insertion of material deleted from one chromosome into another, nonhomologous chromosome.

• t. of arterial trunks — see transposition of great vessels (below).
• t. of great vessels — a congenital heart defect, in which the position of the chief blood vessels of the heart is reversed. Called also transposition of arterial trunks.
• ulnar styloid t. — a surgical procedure for correction of growth deformity resulting from premature closure of the distal ulnar physis. The distal tip of the ulna is fused to the distal radial epiphysis.

Transposition may refer to:

Mathematics

• Transposition (mathematics), a permutation which exchanges two elements and keeps all others fixed
• Transposition, producing the transpose of a matrix A^T, which is computed by swapping columns for rows in the matrix A

Games

• Transposition (chess), different moves or a different move order leading to the same position, especially during the openings
• Transposition table, used in computer games to speed up the search of the game tree

Biology

• Transposition of the great vessels, cardiac transposition, a congenital heart defect with malformation of any of the major vessels
• Transposons, or genetic transposition, a mutation in which a chromosomal segment is transferred to a new position on the same or another chromosome

Other uses

• Transposition (law), the incorporation of the provisions of a European Union directive into a Member State's domestic law
• Transposition (logic), a rule of replacement in philosophical logic
• Transposition (music), moving a note or collection of notes up or down in pitch by a constant number of semitones.
• Transposition (telecommunications)
• Transposition cipher, an elementary cryptographic operation
• Transposition, docking, and extraction an orbital maneuver performed on the Apollo lunar missions
• Transposition, sleight of hand magic, a performer appears to make two different objects ([usually] coins or cards) switch places with one another faster than physically possible.

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