[pawr-tuh-tiv, pohr-] 
| 1. | capable of being carried; portable. |
| 2. | having or pertaining to the power or function of carrying. |
| 3. | Also called portative organ. a small portable pipe organ used esp. during the Middle Ages and the Renaissance. |
portative organ
small musical instrument played from the 12th through the 16th century, popular for secular music. It had one rank of flue pipes (producing a flutelike sound), sometimes arranged in rows to save space, and was slung from the player's neck by a strap. The keys and pipes lay at right angles to the player, who used two fingers of his right hand to play melodies. With his left hand he worked a bellows at the back of the instrument. Except for occasional drones (sustained notes played against a melody), the portative organ played music consisting only of a melodic line. Its compass was from two to three octaves
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