• WordNet 3.6
    • n fibril a very slender natural or synthetic fiber
    • ***
Webster's Revised Unabridged Dictionary
    • n Fibril A small fiber; the branch of a fiber; a very slender thread; a fibrilla.
    • ***
Century Dictionary and Cyclopedia
    • n fibril A small fiber; a fibrilla; a filament.
    • n fibril Specifically In botany: One of the delicate cottony hairs or thread-like growths found upon the young rootlets of some plants.
    • n fibril A rootlet of a lichen.
    • n fibril One of the filaments which line the utricles of Sphagnum.
    • n fibril The stipe of some fungi: in this sense disused.
    • n fibril In histology, a delicate fiber, such as, according to one theory, is found in the protoplasm of cells.
    • ***
Chambers's Twentieth Century Dictionary
    • ns Fibril a small fibre; one of the extremely minute threads composing an animal fibre
    • ***


Webster's Revised Unabridged Dictionary
F. fibrille, dim. of fibre, L. fibra,
Chambers's Twentieth Century Dictionary
Fr.,—L. fibra, a thread.


In literature:

It is interesting to note that he mentions what is probably auricular fibrillation.
"The Evolution of Modern Medicine" by William Osler
This tissue consists of bundles of very delicate fibrils bound together by a small amount of cement substance.
"A Practical Physiology" by Albert F. Blaisdell
The epidermis is devoid of bloodvessels, but is provided with fine nerve fibrils which ramify between the cells of the rete mucosum.
"Diseases of the Horse's Foot" by Harry Caulton Reeks
Then why this fibril anxiety never to be long beyond call?
"Out of the Ashes" by Ethel Watts Mumford
On the outside of the elastic membrane, just beneath the ectoderm, is a plexus or cobweb of nervous cells and fibrils.
"The Whence and the Whither of Man" by John Mason Tyler
Its fibres are very long, cylindrical, wrinkled longitudinally, and furnished with some lateral fibrils.
"The Commercial Products of the Vegetable Kingdom" by P. L. Simmonds
Tiny nerve fibrils penetrate every muscle, ending in the muscle fibers.
"The Science of Human Nature" by William Henry Pyle
The surface at first is nearly smooth, presenting a soft, silky appearance from numerous loose fibrils.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc." by George Francis Atkinson
The common type of lesion is a dry arthritis with fibrillation and eburnation of the articular surfaces.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition." by Alexander Miles
The stem is solid, unequal, rooting, smooth, sometimes reticulated with black fibrils or scaly.
"The Mushroom, Edible and Otherwise" by M. E. Hard
P. golden with fibrils of same colour; s. yellow; g. shortly decur.
"European Fungus Flora: Agaricaceae" by George Massee
Her soft cheek neared mine with a downy magnetism, and vagrant fibrils of tawny hair danced with the wind against my ear.
"Love's Usuries" by Louis Creswicke
With the exception of these last cells the object of the neuroglia cells is to insulate nerve fibrils and cells from one another.
"Psychotherapy" by James J. Walsh
Some hold that the state of perpetual irregular pulse is associated with auricular fibrillation.
"Arteriosclerosis and Hypertension:" by Louis Marshall Warfield
From the neck to the end of the tail centrally runs a bundle of fibrils, the axial filament.
"Essays In Pastoral Medicine" by Austin ÓMalley
This fibrillation of mucus is regarded as the result of a coagulation of its mucin, previously held in solution by an alkali.
"A System of Practical Medicine by American Authors, Vol. I" by Various
This plumps the fibres, separates the fibrils and kills the grease.
"Animal Proteins" by Hugh Garner Bennett

In poetry:

The flowering all inward and womb-fibrilled;
And but one orifice.
"Figs" by D H Lawrence
But later, in the sun of the afternoon
Having tasted all there was to taste, and having slept his fill
He fell to frowning, as he lay with his head on his paws
And the sun coming in through the narrowest fibril of a
slit in his eyes.
"St. Mark" by D H Lawrence

In news:

Atrial fibrillation patients who took the capsules had about as many episodes as those on placebo. Atrial Fibrillation: 3 Reasons to Protect Your Heart Health.
Apixaban (Eliquis) For Atrial Fibrillation Gets Positive European Recommendation.
Medtronic Gets FDA Nod on Atrial Fibrillation Device.
New hope for atrial fibrillation sufferers.
David Gartman (center) and his team operate on their portion of the second patient ever west of the Mississippi to receive a hybrid procedure for atrial fibrillation at Swedish Medical Center.
Atrial fibrillation is easy to find, but evidence on how best to treat it isn't.
Atrial fibrillation should not lead to cardiac arrest.
I've recently been diagnosed with atrial fibrillation.
Phase III Results Promising for Diabetes, Gaucher, Atrial Fibrillation Drugs.
People who have atrial fibrillation may not always feel symptoms, however, Dr Sigurds Janners said if the heart condition goes unnoticed, it can increase one's risk of stroke.
In November of 2010, I was diagnosed with atrial fibrillation .
Philadelphia, PA, March 20, 2012– The Canadian Journal of Cardiology ( has published a focused update to the Canadian Cardiovascular Society's atrial fibrillation guidelines.
Today's Discovery: Atrial fibrillation .
AAFP's LearningLink Adds Series on Thromboprophylaxis in Atrial Fibrillation .

In science:

Measures based on nonlinear dynamics ((cid:147)point correlation dimension(cid:148) P2Di) are also reported to be able to discriminate, using heart beat data, patients with high risk for ventricular fibrillation (VF) among cardiac patients.
Review of Nonlinear Methods and Modelling
In other study (Vikman et al. 1999) a significant decrease in the ApEn was observed before the spontaneous onset of paroxysmal atrial fibrillation (AF).
Review of Nonlinear Methods and Modelling
Studying heart beat time series it was also found that for τ > 6 the healthy individuals showed higher entropy than subjects with atrial fibrillation (AF) and subjects with congestive heart failure (CHF).
Review of Nonlinear Methods and Modelling
Sinha S, Pande A and Pandit R: "Defibrillation via the elimination of spiral turbulence in a model for ventricular fibrillation".
Review of Nonlinear Methods and Modelling
Vikman S et al.: "Altered complexity and correlation properties of R-R interval dynamics before spontaneous onset of paroxysmal atrial fibrillation".
Review of Nonlinear Methods and Modelling
Nature designs tough collagen: Explaining the nanostructure of collagen fibrils.
Mechanical Properties of Graphene Papers
That (ii)⇒(iii) then follows from the Fibril lation lifting lemma 9.6 and Ex. 9.5.
Quillen Theorems Bn for homotopy pullbacks of (infinity, k)-categories