aerophore
/ˈɛːrə(ʊ)fɔː/noun
1 Botany. In certain ferns: a specialized structure with numerous stomata for aeration, usually seen as a band of pale tissue on the stem or a small outgrowth at the base of a frond.
2Any of several forms of respirator, especially one with a portable supply of air for use by divers and miners. Now historical.
Origin
Mid 19th century; earliest use found in William Hooker (1785–1865), botanist. From aero- + -phore.