| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
densitometer den·si·tom·e·ter (děn'sĭ-tŏm'ĭ-tər)
n.
An apparatus for measuring the optical density of a material, such as a photographic negative.
See densimeter.