An Etymological Dictionary of Astronomy and Astrophysics

A process by which the nucleosynthesis products inside a star are drawn to upper layers of the star. → first dredge-up;
→ second dredge-up; → third dredge-up.

Etymology (EN): From M.E. (Scots) dreg-, O.E. draeg- (in drægnet “dragnet”), akin to dragan “to draw” + up.

Etymology (PE): Birunkašid, past stem of birun kašidan, from birun “out, the outside” (Mid.Pers. bêron, from bê “outside, out, away”

• rôn “side, direction,” Av. ravan- “(course of a) river”) +
  kašidan “to draw,” Mid.Pers. kašitan, Av. karš- “to draw,” Skt. kars-, kársati “to pull, drag, plough,”
  Gk. pelo, pelomai “to be busy, to bustle.”