Any sedimentary rock that forms, as sediments settle out of a solution, is called a chemical sedimentary rock. Sediments can settle out of a solution either by the liquid in the solution evaporating, or by too much of the sediment dissolving in the solution (called supersaturation).
A lozenge (â), often referred to as a diamond, is a form of rhombus. The definition of lozenge is not strictly fixed, and it is sometimes used simply as a synonym (from the French losange) for rhombus. Most often, though, lozenge refers to a thin rhombusâa rhombus with acute angles of less than 45Â°.
In botany, leaf shape is a description of the form of the part of a plant known as the leaf. It is characterised with the following terms (with botanical Latin in italics in brackets) to describe the shape of leaves 1  : Acicular (acicularis): Slender and pointed, needle-like. 2  Acuminate (acuminata): Tapering to a long point. 3  Acute: Pointed, having a short sharp apex angled less than 90Â°.