The Collaborative International Dictionary
Lacustral
Lacustral \La*cus"tral\, Lacustrine \La*cus"trine\, a. [L. lacus lake: cf. F. lacustral, lacustre.] Found in, or pertaining to, lakes or ponds, or growing in them; as, lacustrine flowers.
Lacustrine deposits (Geol.), the deposits which have been accumulated in fresh-water areas.
Lacustrine dwellings. See Lake dwellings, under Lake.
Wiktionary
lacustral
a. Relating to lakes; lacustrine.