In zoology, relating to or denoting the region of an echinoderm opposite to the ambulacral areas (the grooves containing tube feet).
From anti- 'opposite' + ambulacral (from Latin ambulacrum 'a walking place' + -al). Medical/zoological terminology combining classical roots to describe structural opposites.
Antambulacral is a perfect example of how scientists create technical jargon by combining opposites—if ambulacral means 'having tube feet for movement,' antambulacral means the opposite side. It's efficient but nearly incomprehensible to non-specialists!
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