kän|kā(ˌ)vō|känˌkāv adjective
Etymology: concavo- (from Latin concavus ) + English concave
: concave on both sides — used especially of a lens
kän|kā(ˌ)vō|känˌkāv adjective
Etymology: concavo- (from Latin concavus ) + English concave
: concave on both sides — used especially of a lens
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012