harmonˈicon noun

1. A harmonica
2. An orchestrion
3. A pyrophone (as in chemical harmonicon)

harmonˈics singular noun

The science or study of musical acoustics

harmonious /-mōˈni-əs/ adjective

1. In, having or producing harmony
2. In agreement
3. Aesthetically pleasing to the ear or eye
4. Concordant
5. Congruous

harmōnˈiously adverb

harmōnˈiousness noun

harmoniphone or harmoniphon /-monˈi-fōn or -fon/ noun

A keyboard wind instrument with reeds

harˈmonist noun

1. A person skilled in harmony (in theory or composition)
2. A reconciler
3. A person who seeks to reconcile apparent inconsistencies
4. (with cap) a member of a Second Adventist celibate sect (also Harˈmonite) founded by George Rapp (died 1847), from its settlement at Harmony, Pennsylvania

harmonistˈic adjective

harmōnˈium noun

A reed organ, esp one in which the air is forced (not drawn) through the reeds

harmōnˈiumist noun

harmonization or harmonisation /här-mən-ī-zāˈshən or -i-/ noun

1. Any action of the verb harmonize
2. (in the EU) the progressive introduction of norms and standards applicable in all EU countries

harˈmonize or harˈmonise intransitive verb

1. To be or get in harmony
2. To sing in harmony
3. To agree
4. To be compatible (orally, visually, or figurative)

1. To bring into harmony
2. To reconcile (eg points of view)
3. To provide non-unison parts to (eg a song or tune) (music)

harˈmonizer or harˈmoniser noun

harmonogram /-monˈ/ noun

A curve drawn by a harmonograph

harmonˈograph noun

An instrument for tracing curves representing vibrations

harmonomˈeter noun

An instrument for measuring the harmonic relations of sounds

harmonic analysis noun (mathematics)

The process of measuring or calculating the relative amplitudes of all the significant harmonic components present in a complex waveform, frequently presented as a Fourier series

harmonic conjugates plural noun

Two points dividing a line internally and externally in the same ratio

harmonic division noun

Division by such conjugates

harmonic mean noun

The middle term of three in harmonic progression (qv below)

harmonic minor noun

A minor scale with minor sixth and major seventh, ascending and descending

harmonic motion noun (mathematics)

The motion along a diameter of a circle of the foot of a perpendicular from a point moving uniformly round the circumference

harmonic pencil noun (mathematics)

A pencil of four rays that divides a transversal harmonically

harmonic progression noun

A series of numbers whose reciprocals are in arithmetical progression, such numbers being proportional to the lengths of strings that sound harmonics

harmonic proportion noun

The relation of successive numbers in harmonic progression

harmonic range noun

A set of four points in a straight line such that two of them divide the line between the other two internally and externally in the same ratio

harmonic receiver noun

A receiver for electric waves, in harmony with the impulses producing them

harmonic series noun

1. Harmonic progression (qv above)
2. The combination or series of notes produced when a string or column of air is vibrated

harmonic triad noun (music)

An old name for the common chord

harmonic wave noun (physics)

A wave whose profile is a sine curve

harmony of the spheres see under sphere

pre-established harmony

The divinely established relation, according to Leibniz, between body and mind, with the movements of monads and the succession of ideas being in constant agreement like two clocks