Relating to or belonging to the family Elachistaceae or the larger group of tiny moths and their characteristics.
From 'Elachistaceae' + '-ous' suffix forming adjectives. This describes something that has the qualities of or belongs to the Elachistaceae group.
Scientific adjectives like this one show how descriptive taxonomy can be—when you say something is 'elachistaceous,' other biologists immediately know you're talking about tiny moths and their specific characteristics.
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