noun

• (botany) A thin-walled area of the roots of some plants growing in swampy conditions through which gasses are exchanged.
  "Segments with more than 25 pairs of veins; indusium minute, ciliate. soon disappearing; a linear-attenuate brown aerophore present at base of each pinna 16."
• (medicine) Aerophore pulmonaire; a respirator for use with neonates and small animals developed by French obstetrician Gairal in 1879.
  "The Aerophore was attached as soon as respiration ceased and was continued for three minutes at which time the animal began to breathe spontaneously."
• (historical) A predecessor of the radio, invented by Rene Homer in the early 1900s for communication between ships.
  "The aerophore will be placed in operation some time during the coming season by the Great Lakes Radio Telephone Company, in conjunction with the wireless telephone."
• (historical) A nineteenth-century device with breathing tubes used by miners and workmen in areas that contain toxic fumes.
  "The aerophore consists of a number of large or small cylinders as desired, which are lowered into the place with the workman. Connected with the cylinders is a long flexible tube almoast an inch in diameter of such strength that it cannot be damaged even by being trod upon."