Path. [mod.L., a. Gr. εὔπνοια, f. εὔπνοος breathing easily, f. εὖ well + πνέ-ειν to breathe.] Natural or normal breathing; easy respiration.

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1706.  in Phillips.

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1721–1800.  in Bailey.

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1847.  in Craig.

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1876.  M. Foster, Physiol., II. ii. (1879), 354. The different conditions of the respiratory centre during apnœa, normal breathing or eupnœa, and dyspnœa.

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