belemnoid

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belemnoid

 [bĕ-lem´noid]
1. dart-shaped.
2. the styloid process.

bel·em·noid

(be-lem'noyd),
Dart-shaped.
[G. belemnon, a dart, + eidos, resemblance]

belemnoid

adjective A near-extinct term for dart-shaped.
References in periodicals archive ?
A total of 191 analyses of stable isotopes were performed on diagenetically screened belemnite calcite samples to determine the seawater palaeotemper-atures and the carbon isotope variations in the time interval studied (see Gomez et al, 2008; Gomez and Goy, 2011 for the latest Pliensbachian and the Early Toarcian, and Gomez et al, 2016, for the all studied interval).
Isotope results for 13C are reported in delta (d) notation as per mil () with an accuracy of 0.31 deviations from the Vienna Pee Dee Belemnite (VPDB) reference standard and 18O delta values are corrected for primary reference Vienna Standard Mean Oceanic Water (VSMOW).
Sylvia Humphrey, assistant keeper of geology at Tyne and Wear Archives and Museums, said: "Belemnites fossils can be found as far North as the North Yorkshire coast because rocks there are Jurassic, which is the right age, but you wouldn't expect to find them in this part of the country.
"Hopefully, this work will corroborate the fossils: belemnite guards have been found in the stomach region of ichthyosaurs so it is assumed that they ate them," he added.
One of these types, belemnite chalk, is found only in Champagne.
Isotope results are reported, using the usual [delta]-notation, as per mil (%) on the VPDB (Vienna Pee Dee Belemnite) scale.
The values of isotopic ratios were expressed in delta (8) and in parts per thousand ([per thousand]), relative to the international standard (Peterson and Fry, 1987) PeeDee Belemnite (PDB) (Roland et al., 2005).
Thus, [[delta].sup.13]C (stable carbon isotope composition) is relative to the VPDB standard (Vienna PeeDee Belemnite), and [[delta].sup.15]N (nitrogen isotope composition) is reported relative to AIR.
The standards were atmospheric nitrogen for [delta][.sup.15]N and Peedee belemnite (PDB) for [delta][.sup.13]C.