floatativeadj.
Etymology: < float n. + -ative suffix.Previous versions of the OED give the stress as: ˈfloatative.
the world > matter > liquid > action or process of floating > [adjective] > tending to or producing flotation
1886 T. O'C. Sloane in 4 Dec. 356 The slight floatative effect of the additional portion of the glass submerged.
This entry has not yet been fully updated (first published 1897; most recently modified version published online June 2019).