(pris-mat´-ic) Said of a sedimentary particle whose length is 1.5 to 3 times its width. Said of a crystal with one dimension markedly longer that the other two; also, said of a metamorphic texture characterized by such crystals.
In geology and petrology, prismatic, or sometimes just called "prism", refers to a usually long, narrow, wedge-shaped sedimentary body with a width to thickness ratio greater than 5 to 1 but less than 50 to 1, and a length 1.5 to 3 times its width.
Just a word to say that the cells are not cylindrical, as nature intended battery cells to be, but fit nicely into a parallelepiped or any other such flattened shape.
Used to describe an item which adds to all resists. For example, a prismatic plus to skills circlet might have +1 to assassin skills, +12 to all resistances.