| sesqui- | |
| —prefix | |
| 1. | indicating one and a half: sesquicentennial |
| 2. | (in a chemical compound) indicating a ratio of two to three: sesquioxide |
| [from Latin, contraction of | |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a scrap or morsel of food left at a meal. |