'Seaweed' is a general term used to describe plants and algae that grow in waterways such as the ocean, and rivers, lakes and streams. In this slideshow, you can learn basic facts about seaweed, including how it is classified, what it looks like, where it is found and why it is useful.1 of 8 Show All.Seaweed' is a general term used to describe plants and algae that grow in waterways such as the ocean, and rivers, lakes and streams. In this slideshow, you can learn basic facts about seaweed, including how it is classified, what it looks like, where it is found and why it is useful. 1 of 8 Show All.
or symmetric. 1. characterized by or exhibiting symmetry; well-proportioned, as a body or whole; regular in form or arrangement of corresponding parts. 2. Geometry. noting two points in a plane such that the line segment joining the points is bisected by an axis: Points (1, 1) and (1, â1) are symmetrical with respect to the x-axis.
tanâ¢gent. 1. a line or plane that touches but does not intersect a curve or surface at a point so that it is closer to the curve or surface in the vicinity of the point than any other line or plane drawn through the point.2.lso called tan .a fundamental trigonometric function that, in a right triangle, is expressed as the ratio of the side opposite an acute angle to the side adjacent to that angle. 3. in immediate physical contact; touching; abutting. 4. a. touching at a single point, as a tangent in relation to a curve or surface.