a. [ L. lustralis, fr. lustrum: cf. F. lustral. See Lustrum. ] 1. Of or pertaining to, or used for, purification; as, lustral days; lustral water. [ 1913 Webster ]
2. Of or pertaining to a lustrum. [ 1913 Webster ]
a. [ L. paluster, -ustris. ] Of or pertaining to a bog or marsh; boggy. [ R. ] [ 1913 Webster ]