Without corn; lacking corn or not containing corn as an ingredient.
From 'corn' plus the suffix '-less' (meaning 'without' or 'lacking'). This straightforward formation follows standard English morphology for creating negatives or absences.
Despite 'cornless' being a simple grammatical construction, it became oddly significant in 20th-century food labeling when corn derivatives (corn syrup, corn starch) became hidden in almost everything, making 'cornless' a legitimately hard-to-find label!
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