impost¹ /imˈpōst/

1. A tax, esp on imports
2. The weight carried by a horse in a handicap race (informal)

impost² /imˈpōst/ (architecture)

1. The upper part of a pillar in vaults and arches, on which the weight of the building is laid
2. A horizontal block resting on uprights

• polychromy
• polyclinic
• polyclinics
• polyclonal
• polyconic
• polycotton
• polycotyledon
• polycotyledonous
• polycotyledons
• polycrotic
• polycrotism
• polycrotisms
• polycrystal
• polycrystalline
• polycrystals
• polyculture
• polycultures
• polycyclic
• polycystic
• polycythaemia
• polycythaemias
• polydactyl
• polydactylies
• polydactylism
• polydactylisms