Noun : the caducity of life.    From Dictionary.com. 

In literature, this eventual caducity is even more notorious.    From Wordnik.com.  [languagehat.com: NO USE WHATEVER.] Reference

Were I to conjecture, I should say that the whole will centre, before it is long, in Mr. Pitt and Co., the present being an heterogeneous jumble of youth and caducity, which cannot be efficient.    From Wordnik.com.  [Letters to his son on The Art of Becoming a Man of the World and a Gentleman] Reference

When you happen to see either Monsieur or Madame Perny, I beg you will give them this melancholic proof of my caducity, and tell them that the last time I went to see the boys, I carried the Michaelmas quarterage in my pocket; and when I was there I totally forgot it; but assure them, that.    From Wordnik.com.  [Letters to his son on The Art of Becoming a Man of the World and a Gentleman] Reference

As for the labour and sorrow which his Majesty K (ing) D (avid) speaks of, I know of no age that is quite exempt from them, and have no fear of their being more severe in my caducity than they were in the flower of my age, when I had not more things to please me than I have now, although they might vary in their kind.    From Wordnik.com.  [George Selwyn: His Letters and His Life] Reference

Their caducity should be recognized and abstergent measures should be taken to expunge them from the lexicon.    From Wordnik.com.  [The Globe and Mail - Home RSS feed] Reference

I do not speak of the ordinary caducity of language, in virtue of which every effusion of the human spirit is lodged in a body of death.    From Wordnik.com.  [Milton] Reference

Don't believe that I am either begging praise by the stale artifice of 'hoping to be contradicted; or that I think there is any occasion to make you discover my caducity.    From Wordnik.com.  [The Letters of Horace Walpole, Earl of Orford — Volume 4] Reference

They embraced, they wept; but they united their arms and counsels; and in his brother's absence, Count Henry assumed the regency of the empire, at once in a state of childhood and caducity.    From Wordnik.com.  [History of the Decline and Fall of the Roman Empire — Volume 6] Reference

The attitude that words may be discarded -- indeed, that words have caducity at all -- is not salubriously abstergent, but reflects an agrestic nisus that all cultivated English speakers must eschew.    From Wordnik.com.  [A Gentleman's C] Reference

I long ago determined to keep the archbishop in Gil Blas in my eye. when I should advance to his caducity; but as dotage steals in at more doors than one, perhaps the sermon I have been preaching to you is a symptom of it.    From Wordnik.com.  [The Letters of Horace Walpole, Earl of Orford — Volume 4] Reference

In the other House Melbourne made, as all allow, a capital speech; Clarendon, a good and fair judge, told me that he never heard Melbourne speak so well throughout; while the Duke was painful to hear, exhibiting such undoubted marks of caducity: it did not, however, read ill.    From Wordnik.com.  [The Greville Memoirs (Second Part) A Journal of the Reign of Queen Victoria from 1837 to 1852 (Volume 1 of 3)] Reference

But I regard myself, not as speaking to please Emerson's admirers, not as speaking to please myself; but rather, I repeat, as communing with Time and Nature concerning the productions of this beautiful and rare spirit, and as resigning what of him is by their unalterable decree touched with caducity, in order the better to mark and secure that in him which is immortal.    From Wordnik.com.  [Elementary Guide to Literary Criticism] Reference

Therefore, I vaticinate that when these fubsy, olid, griseous beards reach caducity and exuviate their mortal coils, the skirr of nitid angel’s wings will not be heard.    From Wordnik.com.  [Save the language! « Write Anything] Reference

Cleansing or scouring agrestic: rural, rustic, unpolished, uncouth apodeictic: unquestionably true by virtue of demonstration caducity: perishableness, senility compossible: possible in coesistence with something else embrangle: to confuse or entangle exuviate: to shed (a skin or similar outer covering): short and stout, squat griseous.    From Wordnik.com.  [Club Troppo] Reference

A state of childhood and caducity.    From Wordnik.com.  [The History of the Decline and Fall of the Roman Empire] Reference

Its charm is that of a thing not vigorous or original, but full of the grace that comes of long study and reiterated refinements, and many steps repeated, and many angles worn down, with an exquisite faintness, une fadeur exquise, a certain tenuity and caducity, as for those who can bear nothing vehement or strong; for princes weary of love, like Francis the First, or of pleasure, like Henry the Third, or of action, like Henry the Fourth.    From Wordnik.com.  [The Renaissance Studies in Art and Poetry] Reference

Its charm is that of a thing not vigorous or original, but full of the grace which comes of long study and reiterated refinements, and many steps repeated, and many angles worn down, with an exquisite faintness, une fadeur exquise, a certain tenuity and caducity, as for those who can bear nothing vehement or strong; for princes weary of love, like Francis the First, or of pleasure, like Henry the Third, or of action, like Henry the Fourth.    From Wordnik.com.  [The Renaissance: studies in art and poetry] Reference