They lay in a huge
sickle-shaped curve that vanished into mist at last towards the Naze.
Some were thickly set with glittering teeth resembling ivory saws; others were tufted with knots of human hair; and one was
sickle-shaped, with a vast handle sweeping round like the segment made in the new-mown grass by a long-armed mower.
With sickle cell trait, intense exertion can cause
sickle-shaped cells to accumulate and create logjams in the blood vessels.
Now, if you've found a male dobsonfly, which sports a pair of
sickle-shaped mandibles that are over an inch long, you're thinking, "Touch that?
The exhibition features three dinosaurs: Acrocanthosaurus, a carnivore and the official dinosaur of the state of Oklahoma; Tenontosaurus, a long-tailed herbivore; and one of Tenontosaurus' predators, Deinonychus, a carnivore with
sickle-shaped, switchblade-like claws.
It is not clear though which plant species actually have a proven effect on preventing red blood cells becoming
sickle-shaped or in preventing the symptoms of sickle cell disease.
The hereditary condition, in which patients develop
sickle-shaped blood cells, is incurable and can cause severe pain among sufferers when the cells block veins - leading to symptoms known as a crisis.
This produces misshapen red blood cells: Instead of the characteristic disc shape, cells become
sickle-shaped, especially in low-oxygen conditions.
The sharp cutoff is particularly pronounced on the northeast edge of the cloud, where the
sickle-shaped dark nebula B111 lies immediately north of M11, the Wild Duck Cluster.
They are one of the easiest birds to recognise with their
sickle-shaped wings and forked tails, Although they look black against the sky they are dark brown, and they never perch.