heck·el·phone 
(hĕkəl-fōn′)
(hĕkəl-fōn′)n.
A woodwind instrument of the oboe family, with a pitch between that of an English horn and a bassoon.
[German Heckelphon, after Wilhelm Heckel (1879-1952), German musical instrument maker.]
- action potential
- Actium
- activate
- activated charcoal
- activation
- activation analysis
- activator
- active
- active galactic nucleus
- active galaxy
- active immunity
- actively
- active-matrix
- activeness
- active recreation
- active site
- active transport
- activewear
- activin
- activism
- activist
- activistic
- activity
- act of God
- actomyosin