Tenor singer
Tenor is a type of classical male singing voice whose vocal range is between the countertenor and baritone voice types. The tenor's vocal range (in choral music) lies between C3, the C one octave below middle C, and A4, the A above middle C. In solo work, this range extends up to C5, or "tenor high C". The low extreme for tenors is roughly A♭2 (two A♭s below middle C). At the highest extreme, some tenors can sing up to two Fs above middle C (F5). The tenor voice type is generally divided into the leggero tenor, lyric tenor, spinto tenor, dramatic tenor, heldentenor, and tenor buffo or spieltenor.
The name "tenor" derives from the Latin word , which means "to hold". As Fallows, Jander, Forbes, Steane, Harris and Waldman note in the "Tenor" article at Grove Music Online,
In polyphony between about 1250 and 1500 [i.e., medieval and Renaissance], the [tenor was the] structurally fundamental (or ‘holding’) voice, vocal or instrumental… [that] by the 15th century… came to signify the male voice that sang such.
All other voices were normally calculated in relation to the tenor, which often proceeded in longer note values and carried a borrowed Cantus firmus melody. Until the late 16th century introduction of the contratenor singers, the tenor was usually the highest voice, assuming the role of providing a foundation. It was also in the 18th century that "tenor" came to signify the male voice that sang such parts. Thus, for earlier repertoire, a line marked 'tenor' indicated the part's role, and not the required voice type; indeed, even as late as the eighteenth century, partbooks labelled 'tenor' might contain parts for a range of voice types.
...
Wikipedia