Quadrilateral. In Euclidean plane geometry, a quadrilateral is a polygon with four sides (or 'edges') and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon (5-sided), hexagon (6-sided) and so on.
Some environmental scientists and specialists focus on environmental regulations that are designed to protect peopleâs health, while others focus on regulations designed to minimize societyâs impact on the ecosystem.
LINK / CITE ADD TO WORD LIST. noun. Environmental science is defined as a branch of biology focused on the study of the relationships of the natural world and the relationships between organisms and their environments.An example of environmental science is the study of the natural world and how it relates to recycling and mulching.INK / CITE ADD TO WORD LIST. noun. Environmental science is defined as a branch of biology focused on the study of the relationships of the natural world and the relationships between organisms and their environments.