Major second

Major second
Inverse	Minor seventh
Name
Other names	whole tone, whole step
Abbreviation	M2
Tuning
12 equal temperament	2 semitones (200 cents)
Pythagorean tuning	9:8 (~203.91 cents)
5-limit tuning	10:9 (~182.40 cents)

${ \omit Score.TimeSignature \relative c' { \time 4/4 \set Score.tempoHideNote = ##t \tempo 4 = 90 <c d>1 | c4 d c2 } }$

A harmonic and melodic major second, or diatonic whole tone.

In Western music theory, a major second (sometimes also called whole tone or a whole step) is a second spanning two semitones (Play^ⓘ). A second is a musical interval encompassing two adjacent staff positions (see Interval number for more details). For example, the interval from C to D is a major second, as the note D lies two semitones above C, and the two notes are notated on adjacent staff positions.