[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.
Hydrogen is the only combustible element, other elements, need an interaction with something else other than its self to be combustible. Therefore Hydrogen is the only fuâ¦el. Fuel such as gasoline have bonds to Hydrogen that bulk it up, slow it down, and generally make Hydrogen dense.