Word forms acceptable. The path from “attitudes” to this concept provides the subtitle of Live in Your Head, an avant-garde exhibition curated by Harald Szeemann (“ZAY-mahn”). Different choices for this title concept mirror different feelings, according to Susanne Langer’s follow-up to Philosophy in a New Key. Clive Bell, who theorized this concept’s “significant” type, promoted a school of art theory named for it that led fellow adherent Clement Greenberg to champion abstract (-5[1])expressionists like Jackson Pollock. That school named for this word stresses a work’s visual properties, such as flatness, over its content. This is the shorter noun in a modernist slogan advocating that a building’s design be driven by its purpose. For 10 points, name this four-letter word for the configuration (10[1])of an artwork that, according to Louis Sullivan, “follows function.” (10[1])■END■ (10[1])