واژگار

concave

انگلیسی
concave (adj.) "incurved," early 15c., from Old French concave (14c.) or directly from Latin concavus "hollow, arched, vaulted, curved," from con-, here perhaps an intensive prefix, + cavus "hollow" (from PIE root keue- "to swell," also "vault, hole").
«فرهنگ مرزبان - معروف»
«معجم احمد محمد عيسي»
«واژه‌نامۀ راه و ساختمان و معماری»
نوعی/مظهری است ازen curved