The tenuity of a hair.    From Wordnet, Princeton University. 

The tenuity of the upper atmosphere.    From Wordnet, Princeton University. 

A shrill yet sweet tenuity of voice- Nathaniel Hawthorne.    From Wordnet, Princeton University. 

To what purpose are you wearied, exhausted, dragged out and out to the very extreme of tenuity?.    From Wordnik.com.  [The Atlantic Monthly, Volume 10, No. 59, September, 1862] Reference

The tenuity of this veil is such that it admits of our seeing the stars through the auroral plates.    From Wordnik.com.  [The Atlantic Monthly, Volume 04, No. 26, December, 1859] Reference

If it were an object to rival the tenuity of the finest India muslin, machinery could easily accomplish it.    From Wordnik.com.  [The Atlantic Monthly, Volume 02, No. 08, June 1858] Reference

The tenuity of the film increases; its cohesion is overcome; lakelets are formed, and they merge into each other.    From Wordnik.com.  [Scientific American Supplement, No. 561, October 2, 1886] Reference

That tenuity in the comet which had previously inspired us with hope, was now the source of the bitterness of despair.    From Wordnik.com.  [Blackwood's Edinburgh Magazine, Volume 62, Number 385. November, 1847.] Reference

Besides the tenuity of the atmosphere, there are other conditions which would cause life to be much different on Mars.    From Wordnik.com.  [Marvels of Modern Science] Reference

The exceeding tenuity of the object of our dread was apparent; for all heavenly bodies were plainly visible through it.    From Wordnik.com.  [Blackwood's Edinburgh Magazine, Volume 62, Number 385. November, 1847.] Reference

Comets consist of cosmical matter which exists in a condition of extreme tenuity, and especially so in the coma and tail.    From Wordnik.com.  [The Astronomy of Milton's 'Paradise Lost'] Reference

We found it to consist of a host of long filaments of extreme tenuity, their diameter being about 1/1000th of a millimetre.    From Wordnik.com.  [The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology)] Reference

In weight, size, and number of its constituents this exterior armour is altogether disproportionate to the extreme tenuity of its foundation.    From Wordnik.com.  [My Tropic Isle] Reference

The tenuity or narrowness of the veins about the brain itself contributes to its being kept cool, and to its not readily admitting the evaporation.    From Wordnik.com.  [On Sleep and Sleeplessness] Reference

If we get over this difficulty, by attributing to this medium a degree of tenuity almost spiritual, we shall run upon Scylla while endeavoring to shun.    From Wordnik.com.  [Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence] Reference

It scarcely needs demonstration to prove that extreme tenuity can alone account for the extraordinary velocities recorded by observers of solar phenomena.    From Wordnik.com.  [Scientific American Supplement, No. 458, October 11, 1884] Reference

These differences Homer knew, since he represents women and boys with treble voices, by reason of the tenuity of their breath; men, he makes with bass voices.    From Wordnik.com.  [Essays and Miscellanies] Reference

He was a small, aged man, very thin and meagre in aspect — so meagre as to conceal in part, by the general tenuity of his aspect, the shortness of his stature.    From Wordnik.com.  [Nina Balatka] Reference

The bedding consisted of a hard straw mattress and a single woollen coverlet which, judging by its tenuity, had already seen service with generations of sleepers.    From Wordnik.com.  [Humphrey Bold A Story of the Times of Benbow] Reference

And from the extreme tenuity of its upper layers, is probably forced into immense waves, which will observe to a certain degree, a general parallelism north and south.    From Wordnik.com.  [Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence] Reference

Depute Advocate was fagged; Whaup surly as a bear with a sore ear, on account of the tenuity of his fees; and Strachan, of course, in an extremely unconversational mood.    From Wordnik.com.  [Blackwood's Edinburgh Magazine, Volume 62, No. 382, October 1847] Reference

Our metal is better, and its greater cost has united with the scarcity of labor which so stimulated ingenuity in other departments of industry to enforce tenuity of form.    From Wordnik.com.  [Lippincott's Magazine of Popular Literature and Science Volume 17, No. 100, April, 1876] Reference

He felt that the real Lily was still there, close to him, yet invisible and inaccessible; and the tenuity of the barrier between them mocked him with a sense of helplessness.    From Wordnik.com.  [The House of Mirth] Reference

We had long regarded the wanderers as vapoury creations of inconceivable tenuity, and as altogether incapable of doing injury to our substantial globe, even in the event of contact.    From Wordnik.com.  [Blackwood's Edinburgh Magazine, Volume 62, Number 385. November, 1847.] Reference

Sunlight is but the same, in form of extreme tenuity.    From Wordnik.com.  [New and Original Theories of the Great Physical Forces] Reference

By boldly diffusing in space a medium of the requisite tenuity and elasticity.    From Wordnik.com.  [Fragments of science, V. 1-2] Reference

But the grounds on which this assertion is based are wonderful in their tenuity.    From Wordnik.com.  [Story of Creation as Told By Theology and By Science] Reference

Next to this charming tenuity, perhaps her paleness was her most noticeable trait.    From Wordnik.com.  [The Pit] Reference

The long arm of coincidence stretched to aching tenuity by the dramatist and the novelist!.    From Wordnik.com.  [The Dop Doctor] Reference

A little less and it could not have run at all, water could not stretch out to greater tenuity.    From Wordnik.com.  [The Life of the Fields] Reference

When taken in connection with its tenuity, these features show a highly developed potter's technique.    From Wordnik.com.  [Archeological Expedition to Arizona in 1895 Seventeenth Annual Report of the Bureau of American Ethnology to the Secretary of the Smithsonian Institution, 1895-1896, Government Printing Office, Washington, 1898, pages 519-744] Reference

Uranus forms a circumference, the substance would evidently be in a state of extreme tenuity and diffusion.    From Wordnik.com.  [A Theory of Creation: A Review of 'Vestiges of the Natural History of Creation'] Reference

In spite of the tenuity of my purse I felt obliged to give my friends this mark of my gratitude for the kindness they had lavished on me.    From Wordnik.com.  [The Complete Memoirs of Jacques Casanova] Reference

Otherwise we are likely to feel chilly: we grow too fine where tenuity of stature is necessarily buffetted by gales, namely, in our self-esteem.    From Wordnik.com.  [Complete Project Gutenberg Works of George Meredith] Reference

They are fragile and hollow, for all the play of colour on them, like a soap bubble that breaks of its own tenuity, and is only a drop of dirty water.    From Wordnik.com.  [Expositions of Holy Scripture Ephesians; Epistles of St. Peter and St. John] Reference

Half an hour out of London the fog grew thinner, breaking into lace-like shreds in the woods as the train sped by, or expanding into lustrous tenuity above him.    From Wordnik.com.  [Trent's Trust, and Other Stories] Reference

The extreme tenuity of these constituent molecules, which represent the last term of inorganic matter, allows it to pass through the walls and partitions of apartments.    From Wordnik.com.  [The Problems of Psychical Research Experiments and Theories in the Realm of the Supernormal] Reference