1. (n.) Strictly, the hole through which melted metal is poured into the gate, and thence into the mold.

2. (n.) The waste piece of metal cast in this hole; hence, dross.

3. (n.) Same as Sprew.

French door aboideau access admissions air lock arch dam archway assemblage attendance audience avails back door backstop ball cock ball valve bamboo curtain bank bar barrage barrier barway bear-trap dam beaver dam boom box office breakwater breastwork brick wall buffer bulkhead bullion bulwark bunghole button carriage entrance cashiering cast casting cellar door cellarway cock cofferdam commissions conge credit credits crowd dam defense deposal dike discharge disemployment dismissal displacing disposable income ditch dividend dividends dock gate door doorjamb doorpost doorway drain cock draw cock drumming out earned income earnings earthwork embankment entrance exit faucet fence firing flood-hatch floodgate forced separation front door furloughing gains gate receipts gatepost gateway get gravity dam groin gross gross income gross receipts hatch hatchway head gate hydrant hydraulic-fill dam income ingate ingot intake iron curtain jam jetty layoff leaping weir levee lintel lock lock gate logjam make milldam moat mole mound needle valve net net income net receipts opening output parapet passage penstock petcock pig pink slip porch portal portcullis porte cochere postern proceeds produce profits propylaeum pylon rampart receipt receipts receivables regulus removal retirement returns revenue roadblock rock-fill dam royalties runner scuttle sea cock seawall sheet metal shutter dam side door sluice sluice gate sow spigot sprue stile stone wall stopcock storm door surplusing suspension take take-in takings tap tedge the ax the boot the bounce the gate the sack threshold ticket tide gate tollgate trap trap door turnpike turnstile unearned income valve valvula valvule walking papers wall water gate weir wicket dam work yield