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any cephalopod mollusk of the extinct order Ammonoidea, from the Devonian to the Cretaceous periods, having a coiled, chambered shell.
Any of various extinct cephalopods of the subclass Ammonoidea living from the Devonian to the Cretaceous Periods. Ammonoids had a symmetrical, coiled, chambered shell with angular sutures between the chambers. They are closely related to the nautiloids, including the modern-day chambered nautilus.


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    to subject to . to undergo .

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    the material fired, scattered, dropped, or detonated from any weapon, as bombs or rockets, and especially shot, shrapnel, bullets, or shells fired by guns. the means of igniting or exploding such material, as primers, fuzes, and gunpowder. any material, means, weapons, etc., used in any conflict: a crude ammunition of stones. information, advice, or supplies […]

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