(n.) 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.
Example Sentences:
(1) Start your exploring at Bearreraig Bay, where, if you are lucky, you may find belemnites, ammonites and bivalves.
(2) Six Holstein cows in mid-lactation were placed on a diet naturally low in 13C (-25.0% vs Pee Dee belemnite [PDB] an international carbon isotope standard), based on alfalfa-barley, and six others were placed on a diet naturally enriched in 13C (-11.5% vs PDB), based on corn.
Cuttlefish
Definition:
(n.) A cephalopod of the genus Sepia, having an internal shell, large eyes, and ten arms furnished with denticulated suckers, by means of which it secures its prey. The name is sometimes applied to dibranchiate cephalopods generally.
(n.) A foul-mouthed fellow.
Example Sentences:
(1) Whether Philip Hammond is soft snow or a spurting cuttlefish is difficult to say.
(3) The diets were presented for periods of 2 to 11 weeks to octopuses, cuttlefishes or squids and in most trials the results were compared to animals fed control diets of live marine shrimps, crabs or fish.
(4) The sex differenciation in the gonad of the cuttlefish is only evident after the hatching, -- the "A" cells become spermatogonia or ovogonia.
(5) The content of polyunsaturated fatty acids in lipids of Bartram and Comandor squids and cuttlefish comprises 47.59-49.84%.
(6) In unilaterally blinded octopus and cuttlefish, the optic lobe of the deprived side showed a decreased uptake of the labelled tracer.
(7) The search for it in squids and cuttlefishes led to the discovery of the giant nerve fibres.
(8) When there is a gap between one's real and one's declared aims, one turns as it were instinctively to long words and exhausted idioms, like a cuttlefish squirting out ink.'
(9) These studies have been carried out on the cerebellum and some other regions in a variety of species that include rat, turtle, skate and an intervertebrate, the cuttlefish.
(10) While their double-shelled relations (clams, mussels, oysters, scallops, etc) specialise in filtering water to remove food particles, and their single-shelled little cousins (periwinkles, whelks, limpets, conches) specialise in, well, adorning a seafood platter, cephalopods (octopus, cuttlefish and squid) specialise in a seriously impressive form of self-defence.
(11) With an arginine content of about 77%, cuttlefish protamine is one of the most basic proteins which have ever been characterized and the first typical protamine sequenced in invertebrates.
(12) We stopped for lunch at Flor do Arneiro (Sitio Arneiro 260, +351 289 815 287) in Arneiro near Faro, a fine restaurant serving cataplana (a dish of cuttlefish, clams and onions), where Don Chumbhino gave us some recipes for the dishes we were eating.
(13) Experimental foods were smoked cuttlefish (sectile food), raisins (food flattened under pressure), and peanuts (crushable food).
(14) Effects of noradrenaline and the related compounds adrenaline, dopamine, octopamine, tyramine, clonidine and isoprenaline were studied in isolated heart preparations from the cuttlefish Sepia officinalis L. 2.
(15) Without head orientation, the cuttlefish still rotates with its fins.
(16) The musculature of the fins of the cuttlefish Sepia officinalis (Mollusca, Cephalopoda) was studied with electromyography to test predictions of the functional role of the various muscle masses.
(17) The blood-brain interface was studied in a cephalopod mollusc, the cuttlefish Sepia officinalis, by thin-section electron microscopy.
(18) The predatory behaviour of the cuttlefish comprises several stages: prey-detection, orientation, translation and prey-seizing.
(19) The tetra-, tri-, di-, mono-, and nonacetylated forms of cuttlefish H4 represent 2, 6.4, 18, 32.2, and 41.4% of the whole histone, respectively.
(20) In cuttlefish, as in selachians and mammals, spermiogenesis is characterized by the double nuclear protein transition histones----intermediate protein (protein T)----protamine (protein Sp).