noun
retractive breathing
Medical term for breathing characterized by inward movement of the chest wall, often seen in respiratory distress.
小児の陥没呼吸は、呼吸困難の重要なサインです。
Retractive breathing in children is an important sign of respiratory distress.
Compound of 陥没 (retraction, sinking) and 呼吸 (breathing). The exact historical derivation is uncertain; the term is used in modern medical contexts.