Designating engines and boilers using steam at low pressure; of, relating to, or used in engines and boilers of this kind.

tubular-shaped; esp. in Botany with another adjective, denoting a combination of tubular with another form, as tubular-campanulate, tubular-urceolate…

having many tubes; esp. designating a boiler having many tubes traversing the flame space.

Containing or composed of tubes: = tubular, adj. 3. Of a steam boiler: Having either fire-tubes or water-tubes.

attributive. Designating a type of vertical water tube designed by Field; designating a boiler using such tubes.

Used attributively to designate a water-tube boiler invented and patented by Allan Stirling (U.S. Pat. 381,595 (1888)), usually consisting of three…

Having a flue or duct. In combination, as double-flued adj.