A small accessory bony projection or process on a vertebra, located above a main apophysis.
From epi- (upon) + apophysis (outgrowth). The prefix epi- indicates it's a secondary or additional projection above another structure.
Your vertebrae are like LEGO bricks with extra little studs—epapophyses are those extra studs on the back of the spine. They help muscles attach and make your backbone incredibly stable and precisely articulated.
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