[tÃ¤râ²sÉs] pl. tarsi. Etymology: Gk, tarsos, flat surface. 1 the flat area of articulation between the foot and the leg or the edge of the eyelid. 2 also called tarsal cartilage, tarsal plate. Any one of the fibrous plates of cartilage about 2.5 cm long that form the eyelids. One tarsal plate shapes and gives solidarity to the edge of each eyelid.
Hydrogen is reduced by elements that are less electronegative to form compounds in which its oxidation number is -1. Properties and Formation of Hydrogen. At room temperature, hydrogen is a colorless, odorless gas with a density only one-fourteenth the density of air. Small quantities of H 2 gas can be prepared in several ways. 1.
solid - of definite shape and volume; firm; neither liquid nor gaseous; ice is water in the solid state. hard - resisting weight or pressure. gaseous - existing as or having characteristics of a gas; steam is water is the gaseous state.