Gaga (meaning "mentally senile", "crazy", "infatuated"), ga-ga and variants in other languages may refer to:
Gaga is a minor Babylonian deity featured in the Enûma Eliš. She is sent by Anshar to the forces of Tiamat with the formal announcement of Marduk's readiness to battle Tiamat.
Gaga (gaga lipfern) is a genus of 19 species of ferns in the family Pteridaceae named after American singer and songwriter Lady Gaga. Two of the 19 species are newly-described—Gaga germanotta from Costa Rica, named after the family of the singer; she was born Stefani Germanotta, and Gaga monstraparva, in honor of Gaga's fans, whom she calls "little monsters". According to biologists, the ferns bear a close resemblance to Gaga's costume from the 52nd Annual Grammy Awards and also bear a distinct DNA sequence spelling GAGA.
Except for the two new species, the rest of the Gaga ferns were reclassified, having previously been assigned to the genus Cheilanthes, based on their outward appearance. Biologists at Duke University explained that they listed the ferns with the name Gaga, due to the singer's active support of equality and individual expression. The decision received widespread attention from the science community and the media.
"We study, in particular, a group of ferns called the cheilanthoid ferns, there are about 500 or 600 of them, and many of them tend to be more adapted to living in desert situations, which is unusual for ferns... We've been doing a lot of molecular sequencing, looking at a lot of plant material, doing a lot of field work, so we're now at the point where we're concluding some of the work, and we have enough evidence to be able to look at all the data and say, 'Hmmm, there's this group here that is really in the wrong genus... We need to give it a new name'."