Dictionary:

transposition

  (trăns'pə-zĭsh'ən)

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 mean:

• Transposition (cardiac), a congenital heart defect with malformation of any of the major vessels.
• Transposition (chess), different moves or a different move order leading to the same position, especially during the openings.
• Transposition (cryptography), an elementary cryptographic operation
• Transposition (genetics), a mutation in which a chromosomal segment is transferred to a new position on the same or another chromosome
• Transposition (law), the incorporation of the provisions of a European Union directive into a state's domestic law.
• Transposition (logic), a rule of replacement in philosophical logic
• Transposition (mathematics), a permutation which exchanges two elements and keeps all others fixed
• Transposition (music), moving a note or collection of notes up or down in pitch by a constant interval
• Transpose of a matrix, e.g. written A^T
• Transposition table, used in computer games to speed up the search of the game tree
• Transposition (telecommunications)

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