A rare or archaic anatomical or zoological term possibly referring to organisms lacking stomach and nerve structures or combinations thereof.
From Greek 'a-' (without), 'gastēr' (stomach), and 'neura' or 'neuron' (nerve), literally 'without-stomach-and-nerves.' A highly specialized scientific term.
This is a great example of how scientists build complexity from simple parts—string together 'without,' 'stomach,' and 'nerve' and you can describe an entire organism's anatomy in one Greek-derived word.
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