The Collaborative International Dictionary of English v.0.48:
Apnoea \Ap*n[oe]"a\, n. [NL., fr. Gr. 'a priv. + ?, ?, breath, ? to breathe, blow.] (Med.) Partial privation or suspension of breath; suffocation; same as apnea. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
apnea \apnea\ n. 1. transient cessation of respiration. [Also spelled apnoea.] [WordNet 1.5]