Crown shell

(Zool.) See Acorn-shell.

See also: Crown

References in periodicals archive ?
The finale of Broxbourne Council's Millennium Music And Fireworks Spectacular is a 16-inch Brocade Crown Shell - the largest firework in the country - which will explode at 1,500ft.
THE BATTLE OF THE BONFIRES; A penny for the Guy - and thousands of pounds for the fireworks
A procedure for making fixed prosthodontic impressions with the use of preformed crown shells. J Prosthet Dent.
Linear dimensional changes in plaster die models using different elastomeric materials
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