English-Thai Dictionary
belemnite
N หิน โบราณ ที่เกิด จาก การอัด ตัว ของ สิ่งมีชีวิต เป็น รูปกรวย
Webster's 1828 Dictionary
BELEMNITE
n.[Gr. a dart, or arrow, from the root of pello, to throw. ] Arrow-head, or finger stone; vulgarly called thunder-bolt, or thunder stone. A genus of fossil shells, common in chalk and limestone. These shells consist of an interior cone, divided into partitions connected by a syphon, as in the nautilus, and surrounded by a number of concentric layers, made up of fibers radiating from the axis. These layers are somewhat transparent, and when burnt, rubbed or scraped, give the odor of rasped horn. The species are now extinct.
Webster's 1913 Dictionary
BELEMNITE
Be *lem "nite, n. Etym: [Gr. dart, fr. dart, fr. to throw: cf. F.bélemnite.] (Paleon.)
Defn: A conical calcareous fossil, tapering to a point at the lower extremity, with a conical cavity at the other end, where it is ordinarily broken; but when perfect it contains a small chambered cone, called the phragmocone, prolonged, on one side, into a delicate concave blade; the thunderstone. It is the internal shell of a cephalopod related to the sepia, and belonging to an extinct family. The belemnites are found in rocks of the Jurassic and Cretaceous ages. -- Bel *em *nit "ic, a.
New American Oxford Dictionary
belemnite
bel em nite |ˈbeləmˌnīt ˈbɛləmnaɪt | ▶noun an extinct cephalopod mollusk with a bullet-shaped internal shell that is often found as a fossil in marine deposits of the Jurassic and Cretaceous periods. [Order Belemnoidea, class Cephalopoda: many genera. ] ORIGIN early 17th cent.: from modern Latin belemnites, based on Greek belemnon ‘dart. ’
Oxford Dictionary
belemnite
belemnite |ˈbɛləmnʌɪt | ▶noun an extinct cephalopod mollusc with a bullet-shaped internal shell that is typically found as a fossil in marine deposits of the Jurassic and Cretaceous periods. ●Order Belemnoidea, class Cephalopoda: many genera. ORIGIN early 17th cent.: from modern Latin belemnites, based on Greek belemnon ‘dart ’.
The Wordsmith Dictionary