A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | R | S | T | V | W | Z
| Wake Time | The total time scored as wakefulness in a polysomnogram occurring between sleep onset and the final wake-up |
| Wheezing | A musical whistling sound caused by narrowing of the airway |
| Work of Breathing | An objective of the depth and rate of respirations |