steam table

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A table in which containers of cooked food are kept warm by hot water or steam circulating below.

from The Century Dictionary.

• noun A bench or table fitted with shallow steam-tight tanks: used in restaurants, etc., to keep cooked dishes warm.
• noun A tabular arrangement of data relating to steam-pressures, temperatures, and quantities of heat.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A serving table or counter with heaters, traditionally using steam, to keep food warm.
• noun engineering A data table containing the properties of steam under various conditions.