Having the same form, shape, or appearance as something else.
From Latin 'aequi-' (equal) and 'forma' (form or shape). The term was used in technical and scientific contexts to describe objects or structures that share identical morphology.
Mathematicians and biologists use related concepts constantly—like 'isomorphic' for structures with the same form—but 'equiform' is basically the Latin cousin that never became fashionable in modern scientific English.
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