This arch is stable as it stands, but all the voussoirs are pendent (3) and removal of any one of them would cause the structure to collapsePendent (3) structure in architecture: Binondo Church Dome with its pendentives
1667, John Milton, “Book IX”, in Paradise Lost.[…], London:[…][Samuel Simmons], and are to be sold by Peter Parker[…]; [a]nd by Robert Boulter[…]; [a]nd Matthias Walker,[…], →OCLC; republished as Paradise Lost in Ten Books:[…], London: Basil Montagu Pickering[…], 1873, →OCLC, lines 312–314:
Now had they brought the work by wondrous Art / Pontifical, a ridge of pendent Rock / Over the vext Abyſs, […]
Nectar ran / In courteous fountains to all cups outreach'd;/ And plunder'd vines, teeming exhaustless, pleach'd / New growth about each shell and pendent lyre;[…]
(architecture,of a structure) Either hanging in some sense, or constructed of multiple elements such as the voussoirs of an arch or the pendentives of a dome, none of which can stand on its own, but which in combination are stable.
(heraldry) Hanging or pointed downward; (of a crescent) with its horns pointing downward.
1780, Joseph Edmondson, A Complete Body of Heraldry:
Jandrell, Sa. three buckles, the tongues pendent ar. two and a one.
1828, William Berry, Encyclopaedia Heraldica, Or Complete Dictionary of Heraldry: Dictionary of Heraldry, page 89:
Az. a chev. or, betw. three acorns, pendent, Kymberlee.
1844, John Burke, Bernard Burke, Encyclopædia of Heraldry, page 49:
JAUDRILL. Ermines, three round buckles ar. tongues pendent.
1981, Bruno Bernhard Heim, Armorial Bruno Bernard Heim, Colin Smythe:
page 207: de CAMPO REAL: chequy Sable and Argent on a chief Gules a crescent pendent of the field.
(grammar,of a sentence)Incomplete in some sense, such as lacking a finite verb.