BELEMNITE
\bɪlˈɛmna͡ɪt], \bɪlˈɛmnaɪt], \b_ɪ_l_ˈɛ_m_n_aɪ_t]\
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a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae
By Princeton University
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a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae
By DataStellar Co., Ltd
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A fossil abundant in chalk and limestone, apparently the internal bone or shell of extinct naked cephalopods, allied to the existing squid and cuttlefish-commonly called arrow-head or finger-stone, also thunderbolt or thunder-stone.
By Stormonth, James, Phelp, P. H.
Word of the day
trigger-area
- Any point circumscribed area, irritation of which will give rise to functional action or disturbance elsewhere.