You can say that they provide the same function for the organism, but their origin i different. For example, bats, birds and dragonflies all have wings, but bone placement isn't present in dragonflies as it is in birds and bats. They all let them fly, but they evolved into that form in different ways. It's two structures (or more) that perform the same function but evolved separately.
A benzenoid is a compound with an electronic structure analogous to that of benzene.
Micronucleus is a structure of a paramecium that is analogous to a reserve library
It's homoplasy.
Homologous organs have similar embryonic origin and basic structure whereas Analogous organs have different embryonic origin and basic structure. Homologous organs may look different and may perform different function; e.g., forelimb of a man and flipper of a whale. Whereas Analogous organs look alike and perform same functions; e.g., Wings of birds and insects.
Homologous structures are features with a similar anatomical origin but have different functions, indicating common ancestry, such as the limbs of vertebrates. Analogous structures have similar functions but different anatomical origins, suggesting they evolved independently due to similar environmental pressures, like the wings of birds and insects.
Analogous structure supports evolution because some of these structure may have existed long ago, however not all analogous structure support the same evolutionary path.
In a chiasmus structure, the word "analogous" could be presented as "analogous it may be, be it may analogous." This structure creates a symmetrical and balanced effect by mirroring the word order.
appendix
6y8
Homologous organs have similar looking structure and similar origin but different functions . Whereas analogous is just the opposite analogous organs are those that have similar function but different origin and structure
nothing much
gills
The pelvic fin
A benzenoid is a compound with an electronic structure analogous to that of benzene.
Micronucleus is a structure of a paramecium that is analogous to a reserve library
The Webster's dictionary says: Analogous (biol.) similar in function though differing in structure
It's homoplasy.