expiratory
Meaning
Relating to the process of breathing out air from the lungs.
Structure
Usage
The doctor measured his expiratory flow rate.
A forceful expiratory effort is needed to cough effectively.
The ventilator controls both the inspiratory and expiratory phases.
Etymology
The word expiratory is built upon the Latin verb spirare, meaning "to breathe". This root is combined with the prefix ex-, meaning "out", to form the core concept of "breathing out". The suffix -atory is then added to transform the verbal action into an adjective describing anything pertaining to that act of exhalation. Thus, the literal morphemic construction "out-breathe-relating to" directly and logically yields the modern medical and physiological term for the phase of respiration where air is expelled from the lungs.
Analysis
- ex: Latin prefix meaning "out of, from". - spir: Latin root from spirare, meaning "to breathe". - atory: English adjective-forming suffix from Latin -atorius, indicating a relation to an action.