noun. Activation of two or more things together

noun. A process wherein RNA transcription is increased by a coactivator protein

noun. The activation of one muscle coordinately with another

"LPIN1 has a role in lipid synthesis and nuclear receptor coactivation, both of which may be involved in lipid homeostasis and metabolism."

activation  coactivate  coactivity  cocontraction  

coactivational  

captivation