Final answer:
Eccentricity is a mathematical concept that describes the degree of elongation of an ellipse, indicating how much it deviates from being circular, with a higher eccentricity indicating a more elongated shape. Dissimilar generally refers to things that are unalike or different.
Step-by-step explanation:
The term eccentricity is a mathematical concept used to describe the shape of an ellipse. It is the ratio of the distance between the two foci of an ellipse to the length of the major axis. When the eccentricity is closer to 1, the ellipse becomes more elongated. This concept is used both in pure mathematics and in various applications like physics and astronomy, for example, to describe the orbits of planets and satellites. In physics, the eccentricity of an orbit tells us how elongated it is around a celestial body.
The concept of dissimilar refers to things that are not alike or not similar. This word can apply to many subjects and contexts, such as comparing different organisms in biology, different cultural practices in social studies, or dissimilar numbers or patterns in mathematics.