analogue

Short definition from Wiktionary

Adjective

1. 1
   Alternative spelling of analog.

Noun

1. 1
   Something that bears an analogy to something else.
2. 2
   An organ or structure that is similar in function to one in another kind of organism but is of dissimilar evolutionary origin.
3. 3
   Alternative spelling of analog (“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.”)