Located or occurring away from the mouth of an organism, especially used in describing sea creatures like starfish and sea anemones.
From Latin ab (away) + os, oris (mouth) + -al (adjective suffix). This technical anatomical term was coined in the 19th century as zoologists studied radial organisms that lack a clear front and back.
Sea stars have an aboral side (the bumpy back you see) and an oral side (the mouth-facing underside)—this terminology perfectly captures how evolution created symmetrical creatures that don't fit 'front' and 'back' categories.
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