In architecture, having or characterized by two columns, or referring to a building structure with two columns between other architectural elements.
From Greek 'dyo' (two) + 'stylos' (column). The term was used in classical architecture to describe specific arrangements of supporting columns in Greek and Roman temples.
Ancient architects had very precise vocabulary for their buildings—'dyostyle' is just one of a whole family of words ('tetrastyle' for four columns, 'hexastyle' for six) that shows how important counting columns was to classical design!
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