analog

中文： 类似物、同源物

1. Something that bears an analogy to something else. (countable)
2. An organ or structure that is similar in function to one in another kind of organism but is of dissimilar evolutionary origin. (countable) · See also: convergent evolution
3. A structural derivative of a parent compound that differs from it by only one or a few atoms or substituent groups; (usually, especially) such a molecule that retains most of the same chemical properties.

复数 analogs