An alternative, more formal adjective form meaning relating to or characteristic of ditheism or ditheists.
From ditheistic + '-al' suffix, creating a doublet with ditheistic. The '-al' ending is an older, more elaborate way to form adjectives from '-istic' terms.
The fact that English has both 'ditheistic' and 'ditheistical' shows how we used to create multiple adjective forms from the same root—a practice that's mostly died out except in formal or archaic contexts.
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