Does this mean I canât ever say âciao?â Of course the answer to this is no. Youâll hear ciao being said all over Italy â itâs an incredibly common greeting throughout the country. But if youâre paying closer attention, youâll see that itâs almost always used between people who know one another or are in the same peer group.
In building construction, a plenum (pronounced PLEH-nuhm, from Latin meaning full) is a separate space provided for air circulation for heating, ventilation, and air-conditioning (sometimes referred to as HVAC) and typically provided in the space between the structural ceiling and a drop-down ceiling.n buildings with computer installations, the plenum space is often used to house connecting communication cables. Because ordinary cable introduces a toxic hazard in the event of fire, special plenum cabling is required in plenum areas.
1 Plenum chamber, a chamber intended to contain air, gas, or liquid at positive pressure. 2  Plenism, or Horror vacui (physics) the concept that nature abhors a vacuum.3  Plenum (meeting) , a meeting of a deliberative assembly in which all members are present; contrast with quorum.lenum may refer to: 1  Plenum chamber, a chamber intended to contain air, gas, or liquid at positive pressure. 2  Plenism, or Horror vacui (physics) the concept that nature abhors a vacuum.