Having different properties or characteristics when measured in different directions; an older or variant form of anisotropic.
From Greek 'aniso-' (unequal) + 'tropos' (direction) + '-ous' (full of, having), a classical adjectival formation that predates the modern '-ic' ending.
This is an older scientific term that's largely been replaced by 'anisotropic,' but it shows how English morphology evolved—scientists gradually standardized on '-ic' endings for more precision.
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