(noun) a horizontal architectural member spanning and usually carrying the load above an opening
So I shall show you Introductions as one shows a richly carved doorframe chased in gold and surmounted by counts and griffins on a majestic lintel.
Perfect verticality is a completely unachievable abstraction but it does not stop bricklayers continually checking that walls and lintels are as vertical and level as they can possibly be
good point