Falsetto n. : A false or artificial voice; that voice in a man which lies above his natural voice; the male counter tenor or alto voice. See Head voice, under Voice.

Example:
Is Falsetto bad for your voice? Is there an appropriate way of singing Falsetto to prevent damage?

Taxonomy
falsetto voice, singer, modal voice, folds, vibration, vocal folds, head voice, song, pitch, edges, men and women, Hawaiian, speech, vocal ligaments, free encyclopedia, vocal cord, Voice registers, transition.

Defination from the web:
falsetto (Italian diminutive of falso, "false") refers to the vocal register occupying the frequency range just above the modal voice ... The characteristic sound of falsetto is inherently breathy and flute-like, with few overtones present. ...