| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a gadget; dingus; thingumbob. |
periodontal per·i·o·don·tal (pěr'ē-ə-dŏn'tl)
adj.
Surrounding or encasing a tooth.
Relating to or affecting tissues and structures surrounding and supporting the teeth.