Relating to or consisting of formulas; prescribed or formal in nature.
From formula + -ar (Latin -aris, adjectival suffix). This follows Romance language patterns where -ar creates adjectives meaning 'of or relating to' the base noun.
Formular is the scholarly adjective form that never really took off—'formulaic' crowded it out because -aic sounds more energetic in English, even though formular is simpler; it's an example of how rhythm and sound shape which synonyms survive.
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