| pilularia | (n) pillworts, Syn. genus Pilularia |
| pilus | (n) hairlike structure especially on the surface of a cell or microorganism |
| Pilular | a. Of or pertaining to pills; resembling a pill or pills; |
| Pilulous | a. [ L. pilula a pill. See Pill. ] Like a pill; small; insignificant. [ R. ] G. Eliot. [ 1913 Webster ] |