impost

English Thesaurus

1. the lowest stone in an arch -- from which it springs (noun.artifact)

hypernym	:	stone,
definition	:	building material consisting of a piece of rock hewn in a definite shape for a special purpose (noun.artifact)

part meronym	:	arch,
definition	:	(architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it (noun.artifact)

2. money collected under a tariff (noun.possession)

hypernym	:	duty, tariff,
definition	:	a government tax on imports or exports (noun.possession)

hyponym	:	ship money,
definition	:	an impost levied in England to provide money for ships for national defense (noun.possession)