An Etymological Dictionary of Astronomy and Astrophysics

The subterranean conduit from the underlying → magma chamber through which a volcano ejects igneous material. Same as volcanic vent.

Etymology (EN): M.E. venten “to furnish (a vessel) with a vent,” from O.Fr. esventer “to air,” from es-, → ex-,

• venter, from vent, from L. ventus “wind.”

Etymology (PE): Dudkaš “chimney,” literally “smoke extractor,” from dud, → smoke,

• kaš “to extract, to draw,” present stem of kešidan/kašidan “to carry, draw, protract,
  trail, drag” (Mid.Pers. kešidan “to draw, pull;” Av. karš- “to draw; to plow,” karša- “furrow;” cf. Skt. kars-, kársati “to pull, drag, plow;”
  Gk. pelo, pelomai “to move, to bustle;” PIE base k^wels- “to plow”).