pneu·mat·o·phore 
(n-mătə-fôr′, ny-, nmə-tə-, ny-)
(n-mătə-fôr′, ny-, nmə-tə-, ny-)n.
1. A gas-filled sac serving as a float in some colonial marine hydrozoans, such as the Portuguese man-of-war.
2. Botany A specialized respiratory root in certain aquatic plants, such as the bald cypress, that grows upward and protrudes above the water or mud into the air.
- hydromechanics
- hydromedusa
- hydromel
- hydrometallurgical
- hydrometallurgy
- hydrometeor
- hydrometeorological
- hydrometeorologist
- hydrometeorology
- hydrometer
- hydrometric
- hydrometrical
- hydrometrically
- hydrometry
- hydromorphone
- hydronaut
- hydronephrosis
- hydronic
- hydronium
- hydropath
- hydropathic
- hydropathical
- hydropathist
- hydropathy
- hydrophane