Relating to or characteristic of spiders, particularly in older or historical scientific usage.
Adjective form derived from 'Araneida' plus '-al,' forming an adjective meaning 'of or pertaining to.' This construction follows standard scientific naming conventions that allow nouns to become descriptive adjectives.
Adding '-al' to Latin nouns to make adjectives is such a productive pattern in English that you probably use these transformed words without even thinking about it—'temporal,' 'digital,' 'araneidal'—they all follow this ancient formula!
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