| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| the offspring of a zebra and a donkey. |
apnea ap·ne·a (āp'nē-ə, āp-nē'ə)
n.
Temporary absence or cessation of breathing.
sleep apnea n.
Apnea caused by upper airway obstruction during sleep, associated with frequent awakening and often with daytime sleepiness.
| apnea (āp'nē-ə, āp-nē'ə) Pronunciation Key
The temporary absence or cessation of breathing. |
| sleep apnea
Apnea caused by upper airway obstruction during sleep, associated with frequent awakening and often with daytime sleepiness. It occurs most often in people who are obese or who have an obstructed respiratory tract or neurological abnormalities. |