— jettisonable , adj.
/jet"euh seuhn, -zeuhn/ , v.t.
1. to cast (goods) overboard in order to lighten a vessel or aircraft or to improve its stability in an emergency.
2. to throw off (something) as an obstacle or burden; discard.
3. Cards. to discard (an unwanted card or cards).
n.
4. the act of casting goods from a vessel or aircraft to lighten or stabilize it.
5. jetsam.
[ 1375-1425; late ME jetteson getaison jactation- (s. of jactatio ) JACTATION ]