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Nervation

The arrangement of nerves and veins, especially those of leaves; neuration.

nerve

One of the whitish and elastic bundles of fibers, with the accompanying tissues, which transmit nervous impulses between nerve centers and various parts of the animal body.

Nerve

To give strength or vigor to; to supply with force; as, fear nerved his arm.

nerve-racking

Extremely irritating to the nerves; stressful; trying; as, nerve-wracking noise.

Nerve-shaken

Affected by a tremor, or by a nervous disease; weakened; overcome by some violent influence or sensation; shocked.

Nerved

Having nerves of a special character; as, weak-nerved.

Nervimotion

The movement caused in the sensory organs by external agents and transmitted to the muscles by the nerves.

Nervimotor

Any agent capable of causing nervimotion.

nervine

Having the quality of acting upon or affecting the nerves; quieting nervous excitement. A nervine agent.

nervomuscular

Of or pertaining to both nerves and muscles; of the nature of nerves and muscles; as, nervomuscular energy.

Nervous

Possessing nerve; sinewy; strong; vigorous.

Nervure

One of the nerves of leaves.

nervus

Any bundle of nerve fibers running to various organs and tissues of the body.

Nescience

Want of knowledge; ignorance; agnosticism.

Nesh

Soft; tender; delicate.

Ness

A promontory; a cape; a headland.

Nesslerize

To treat or test, as a liquid, with a solution of mercuric iodide in potassium iodide and potassium hydroxide, which is called Nessler's solution or Nessler's test, and is used to detect the presence of ammonia.

Nest

To put into a nest; to form a nest for.

nest egg

An egg left in the nest to prevent the hen from forsaking it, and to induce her to lay more in the same place.

Nestful

As much or many as will fill a nest.

Nestling

Newly hatched; being yet in the nest.

Nestor

A genus of parrots with gray heads, of New Zealand and Papua, allied to the cockatoos. See Kaka.

Nestorianism

The doctrines of the Nestorian Christians, or of Nestorius.

Net

To produce or gain as clear profit; as, he netted a thousand dollars by the operation.

Net-veined

Having veins, or nerves, reticulated or netted; as, a net-veined wing or leaf.

Netball

A team game that resembles basketball; a soccer ball is to be thrown so that it passes through a ring on the top of a post.

Nether

Situated down or below; lying beneath, or in the lower part; having a lower position; belonging to the region below; lower; under; -- opposed to upper.

Nethinim

Servants of the priests and Levites in the menial services about the tabernacle and temple.

Netify

To render neat; to clean; to put in order.

Netsuke

In Japanese costume and decorative art, a small object carved in wood, ivory, bone, or horn, or wrought in metal, and pierced with holes for cords by which it is connected, for convenience, with the inro, the smoking pouch (tabako-ire), and similar objects carried in the girdle. It is now much used on purses sold in Europe and America.

nett

remaining after all deductions; same as net a., 3. Contrasted to gross.

netted

resembing a net or a web.

Nettle

To fret or sting; to irritate or vex; to cause to experience sensations of displeasure or uneasiness not amounting to violent anger.

Nettles

The halves of yarns in the unlaid end of a rope twisted for pointing or grafting. Small lines used to sling hammocks under the deck beams. Reef points.

Netty

Like a net, or network; netted.

Network

A fabric of threads, cords, or wires crossing each other at certain intervals, and knotted or secured at the crossings, thus leaving spaces or meshes between them.

network

To connect together into a network; as, to network computers; to network the printer with computers.

networking

Interchanging information or services, among a group; -- of persons or organizations.

Neufchatel

A kind of soft sweet-milk cheese; -- so called from Neufch/tel-en-Bray in France.

Neurad

Toward the neural side; -- opposed to haemad.

Neural

relating to the nerves or nervous system; taining to, situated in the region of, or on the side with, the neural, or cerebro-spinal, axis; -- opposed to hemal. As applied to vertebrates, neural is the same as dorsal; as applied to invertebrates it is usually the same as ventral. Cf. Hemal.

Neuralgia

A disease, the chief symptom of which is a very acute pain, exacerbating or intermitting, which follows the course of a nervous branch, extends to its ramifications, and seems therefore to be seated in the nerve. It seems to be independent of any structural lesion.

Neuralgic

Of or pertaining to, or having the character of, neuralgia; as, a neuralgic headache.

Neurapophysis

One of the two lateral processes or elements which form the neural arch. The dorsal process of the neural arch; neural spine; spinous process.

Neurasthenia

A condition of nervous debility supposed to be dependent upon impairment in the functions of the spinal cord.

Neuration

The arrangement or distribution of nerves, as in the leaves of a plant or the wings of an insect; nervation; venation.

Neurenteric

Of or pertaining to both the neuron and the enteron; as, the neurenteric canal, which, in embroys of many vertebrates, connects the medullary tube and the primitive intestine. See Illust. of Ectoderm.

Neuridin

A nontoxic base, C5H14N2, found in the putrescent matters of flesh, fish, decaying cheese, etc.

Neurilemma

The delicate outer sheath of a nerve fiber; the primitive sheath. The perineurium.

Neurility

The special properties and functions of the nerves; that capacity for transmitting a stimulus which belongs to nerves.

Neurine

A poisonous organic base (a ptomaine) formed in the decomposition of protagon with boiling baryta water, and in the putrefaction of proteid matter. It was for a long time considered identical with choline, a crystalline body originally obtained from bile. Chemically, however, choline is oxyethyl-trimethyl-ammonium hydroxide, while neurine is vinyl-trimethyl-ammonium hydroxide.

Neurism

Nerve force. See Vital force, under Vital.

Neuro-central

Between the neural arch and the centrum of a vertebra; as, the neurocentral suture.

Neuro-epidermal

Pertaining to, or giving rise to, the central nervous system and epidermis; as, the neuroepidermal, or epiblastic, layer of the blastoderm.

Neurocoele

The central canal and ventricles of the spinal cord and brain; the myelencephalic cavity.

Neurocord

A cordlike organ composed of elastic fibers situated above the ventral nervous cord of annelids, like the earthworm.

Neuroglia

The delicate connective tissue framework which supports the nervous matter and blood vessels of the brain and spinal cord; called also K/lliker's reticulum. It is composed of cells which are not neurons. Once thought to serve merely a supporting funciton, they are now believed to have important metablolic functions. Among them are the astrocytes, ependymal cells, oligodendroglia cells, and microglia cells.

Neurokeratin

A substance, resembling keratin, present in nerve tissue, as in the sheath of the axis cylinder of medullated nerve fibers. Like keratin it resists the action of most chemical agents, and by decomposition with sulphuric acid yields leucin and tyrosin.

Neurologist

One who is versed in neurology; also, one skilled in the treatment of nervous diseases.

Neurology

The branch of science which treats of the nervous system.

Neuroma

A tumor developed on, or connected with, a nerve, esp. one consisting of new-formed nerve fibers.

Neuromere

A metameric segment of the cerebro-spinal nervous system.

Neuron

The brain and spinal cord; the cerebro-spinal axis; myelencephalon.

Neuropathic

Of or pertaining to neuropathy; of the nature of, or suffering from, nervous disease.

Neuropathy

An affection of the nervous system or of a nerve.

Neuropodous

Having the limbs on, or directed toward, the neural side, as in most invertebrates; -- opposed to haemapodous.

Neuropore

An opening at either end of the embryonic neural canal.

neuropsychology

the branch of psychology that is concerned with the physiological bases of psychological processes.

Neuroptera

An order of hexapod insects having two pairs of large, membranous, net-veined wings. The mouth organs are adapted for chewing. They feed upon other insects, and undergo a complete metamorphosis. The ant-lion, hellgamite, and lacewing fly are examples. Formerly, the name was given to a much more extensive group, including the true Neuroptera and the Pseudoneuroptera.

Neuropteris

An extensive genus of fossil ferns, of which species have been found from the Devonian to the Triassic formation.

Neurosis

A functional nervous affection or disease, that is, a disease of the nerves without any appreciable change of nerve structure.

Neuroskeleton

The deep-seated parts of the vertebrate skeleton which are in relation with the nervous axis and locomotion.

Neurotome

An instrument for cutting or dissecting nerves.

Neurotomy

The dissection, or anatomy, of the nervous system.

Neurula

An embryo of certain invertebrates in the stage when the primitive band is first developed.

Neuter

A person who takes no part in a contest; one who is either indifferent to a cause or forbears to interfere; a neutral.

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