body parts that were quite different in two lineages in the distant past, but due to similar evolutionary pressures today show a similar structure and function. Parts are NOT similar due to descent from a common ancestor.
In anatomy, similar in appearance or function but otherwise different. Two structures may be analogous if they serve the same purpose but differ evolutionary in origin as, for example, human and insect legs. As compared to homologous.
an organ or structure of one species is said to be analogous to an organ or structure of another organism when both structures have the same function; analogous structures do not necessarily indicate a close relationship between the organisms being compared but an adaptation to similar conditions... for example, the fins of a fish are analogous to the fins of a whale