v. t. [ L. demersus, p. p. of demergere. See Merge. ] To immerse. [ Obs. ] Boyle. [ 1913 Webster ]
a. (Bot.) Situated or growing under water, as leaves; submersed. [ 1913 Webster ]
a. [ L. emersus, p. p. See Emerge. ] (Bot.) Standing out of, or rising above, water. Gray. [ 1913 Webster ]