Webster's Revised Unabridged Dictionary · 1913

Fluctuant

Fluctuant (?; 135) , adjective

[Latin fluctuans, present participle of fluctuare. See Fluctuate.]

1.
(Medicine) Moving like a wave; wavering
(Medicine) showing undulation or fluctuation; as, a fluctuant tumor.
2.
Floating on the waves. [Obsolete] — Bacon