(n.) A fossil cephalopod shell related to the nautilus. There are many genera and species, and all are extinct, the typical forms having existed only in the Mesozoic age, when they were exceedingly numerous. They differ from the nautili in having the margins of the septa very much lobed or plaited, and the siphuncle dorsal. Also called serpent stone, snake stone, and cornu Ammonis.
Example Sentences:
(1) Start your exploring at Bearreraig Bay, where, if you are lucky, you may find belemnites, ammonites and bivalves.
(2) An ambitious project to showcase the prehistory of the south coast of England, famous for its marine fossils from ammonites to giant sea reptiles, has attracted support from David Attenborough and Eden Project founder Tim Smit.
(3) Everest is published by Ammonite Press on 22 May, priced £40.
(4) Cretaceous-Tertiary, 65 million years ago An giant asteroid impact on Mexico, just after large volcanic eruptions in what is now India, saw the end of the dinosaurs and ammonites.
Nautilus
Definition:
(n.) The only existing genus of tetrabranchiate cephalopods. About four species are found living in the tropical Pacific, but many other species are found fossil. The shell is spiral, symmetrical, and chambered, or divided into several cavities by simple curved partitions, which are traversed and connected together by a continuous and nearly central tube or siphuncle. See Tetrabranchiata.
(n.) The argonaut; -- also called paper nautilus. See Argonauta, and Paper nautilus, under Paper.
(n.) A variety of diving bell, the lateral as well as vertical motions of which are controlled, by the occupants.
Example Sentences:
(1) Subjects trained 20 minutes three times per week for at least 6 months to 70% to 85% of maximum heart rate on a treadmill, or to maximum effort for all major muscle groups on Nautilus equipment.
(2) Case patients were more likely to be men (odds ratio, 3.8; 95% confidence interval, 1.2-12.1), suffer from hay fever and asthma (odds ratio, 3.4; 95% confidence interval, 1.0-11.9); to participate in regular exercise (odds ratio, 5.9; 95% confidence interval, 1.1-30.7), especially in the use of Nautilus equipment (p = 0.02); and to use alcohol (odds ratio, 4.4; 95% confidence interval, 1.1-17.5).
(3) A rollicking maritime adventure movie about the mysterious Captain Nemo and his submarine the Nautilus, the original 20,000 Leagues featured Douglas alongside James Mason as Nemo.
(4) Twenty-six healthy, untrained females were studied to determine the effects of a low-intensity Nautilus circuit training program on resting systolic and diastolic blood pressure.
(5) Resistance training consisted of one set of 8-12 repetitions on 10 Nautilus machines.
(6) The story centres on Captain Nemo and his submarine the Nautilus.
(7) Fifty healthy middle-aged women (mean age, 50 years) were randomly assigned to 12 weeks of either aerobic exercise (walking and jogging) or nonaerobic strength exercise (circuit Nautilus training).
(8) Comment: Those involved decline to comment Spain Name: Baroness Carmen Thyssen-Bornemisza Offshore Companies: Sargasso Trustees Ltd (1996-2004) and Nautilus Ltd (1994), both registered in the Cook Is.
(9) Circuit training consisted of 12 to 20 repetitions at 30% to 40% of one repetition maximum on 12 Nautilus exercises with one-minute rests between exercises.
(10) Approximately one week after a graded exercise test (GXT), each patient's maximal voluntary contraction (MVC) was determined on seven upper-body Nautilus machines.
(11) Thus, the amino acid sequence conservation between MASH1 and achaete-scute is reflected in a parallel conservation of cell type specificity of expression, similar to the case of mammalian MyoD and Drosophila nautilus.
(12) Prior to and immediately following training, isometric knee extension strength was evaluated at 9 degrees, 20 degrees, 35 degrees, 50 degrees, 65 degrees, 80 degrees, 95 degrees, and 110 degrees of knee flexion with a Nautilus knee extension tensiometer.
(13) Resistance training consisted of one set of 8-12 repetitions on ten Nautilus machines three times per week.
(14) Trygve Wackenshaw: Nautilus Pleasance Courtyard, to 30 Aug Another New Zealand act but you won’t hear his funny voice because he doesn’t speak, it’s all physical comedy instead.
(15) The receptors are compared to cells in the rhinophore of Nautilus and the olfactory organs of coleoid cephalopods.
(16) The relatively small change seen as a result of this modified Nautilus exercise program may prevent moderate weight lifting from being a practical answer for osteoporosis, even in a highly motivated population.
(17) Strength and flexibility (SF) training consisted of 12 weeks of circuit Nautilus training with no aerobic exercise.
(18) The exercise training, which involved all the major muscle groups, was conducted on Nautilus equipment and required 45-60 min for completion.
(19) This gene, which we have named nautilus (nau), encodes basic and helix-loop-helix domains that display striking sequence similarity to those of the vertebrate myogenic regulatory gene family.
(20) Thirteen subjects who were in good health with no personal history or family history of cardiovascular disease participated in a six-week training program on the Nautilus circuit (14 exercises) and trained at 30% of maximum.