— pneumatophorous /nooh'meuh tof"euhr euhs, nyooh'-/ , adj.
/noo mat"euh fawr', -fohr', nyoo-, nooh"meuh teuh-, nyooh"-/ , n.
1. Bot. a specialized structure developed from the root in certain plants growing in swamps and marshes, serving as a respiratory organ.
2. Zool. the air sac of a siphonophore, serving as a float.
[ 1855-60; PNEUMATO- + -PHORE ]