Adjective : a caustic remark.    From Dictionary.com. 

If too little lime is used, the causticity will fall to approximately half the alkalinity.    From Wordnik.com.  [Steam, Its Generation and Use] Reference

“A field!” said King Louis, looking up, and assuming his wonted causticity of tone and manner.    From Wordnik.com.  [Quentin Durward] Reference

When properly treated, alkalinity, hardness and causticity should be in the approximate relation of 6, 5 and 4.    From Wordnik.com.  [Steam, Its Generation and Use] Reference

"Clubs" are next recommended for those fond of solitude, and their satin luxuries humorously quizzed; but "the Colonial System," which follows, has more causticity.    From Wordnik.com.  [The Mirror of Literature, Amusement, and Instruction Volume 12, No. 322, July 12, 1828] Reference

Their spirit, boldness, and occasional causticity caused them to be much talked about, and three editions were necessary to supply the demand for some numbers of the magazine containing them.    From Wordnik.com.  [International Miscellany of Literature, Art and Science, Vol. 1, No. 3, Oct. 1, 1850] Reference

There was an amiable causticity in that mention of his.    From Wordnik.com.  [Born in Exile] Reference

His humor in conversation, as in his works, was genial and free from all causticity.    From Wordnik.com.  [Abbotsford and Newstead Abbey] Reference

And if viewers are wondering where on the judges 'scale of causticity she'll fall.    From Wordnik.com.  [E! Online (US) - Top Stories] Reference

Oldbuck, with his usual dry causticity of humour, ` ` I could see an excellent reason for it.    From Wordnik.com.  [The Antiquary] Reference

"A field!" said King Louis, looking up, and assuming his wonted causticity of tone and manner.    From Wordnik.com.  [Quentin Durward] Reference

We must simply marry as soon as possible; to-morrow, if necessary, said Bernard, with some causticity.    From Wordnik.com.  [Confidence] Reference

An alkali might, by combining with it; but, then, a pure alkali is itself a poison, on account of its causticity.    From Wordnik.com.  [Conversations on Chemistry, V. 1-2 In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments] Reference

'It shows one's ignorance of such matters,' said Harvey Rolfe, with something of causticity in his humour, when Alma came home after midnight.    From Wordnik.com.  [The Whirlpool] Reference

Berlioz tells us in his Memoires, with his usual vivacity and causticity, what impressions the works of Beethoven made upon the old gentlemen above-named.    From Wordnik.com.  [Frederic Chopin as a Man and Musician]

But I have noticed that when the variety of interviewing upon which I have just animadverted becomes the topic, quiet, reasonable Americans are apt to drop into causticity.    From Wordnik.com.  [Your United States Impressions of a first visit] Reference

The alkalis do, however, acquire some degree of causticity in a strong fire, as appears from their being more easily united with spirit of wine after having been kept in fusion for some time.    From Wordnik.com.  [Experiments upon magnesia alba, Quicklime, and some other Alcaline Substances] Reference

(The Mezereum Tribe.) According to Lindley, the great feature of this tribe is the causticity of the bark, which acts upon the skin as a vesicatory, and causes excessive pain in the mouth when chewed.    From Wordnik.com.  [Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs] Reference

We can bear hearing disagreeable truths spoken to a crowd or to a congregation -- causticity has always been popular in preachers -- because there are other heads than our own upon which to fit the cap.    From Wordnik.com.  [Americans and Others] Reference

But they called her 'a curious creature '; it was inconceivable to them that she should choose to work in a shop; and her tongue had a causticity which was sometimes exceedingly disconcerting and mortifying.    From Wordnik.com.  [Tales of the Five Towns] Reference

They combine and form compound salts with acids, in the same way as alkalies; they are, like them, susceptible of a considerable degree of causticity, and are acted upon in a similar manner by chemical tests.    From Wordnik.com.  [Conversations on Chemistry, V. 1-2 In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments] Reference

Beaumont's dead; by far the most sensible and pleasing man I ever knew; kind, too, in his nature, and generous; gentle in society, and of those mild manners which tend to soften the causticity of the general London.    From Wordnik.com.  [The Journal of Sir Walter Scott From the Original Manuscript at Abbotsford] Reference

A liberal admixture of causticity when excited, as the younger members of the party soon found out.    From Wordnik.com.  [Recollections and reflections : an auto of half a century and more,] Reference

A string of anecdotes or a short biography, rapidly sketched out of the fulness of personal knowledge, and often seasoned with a subtle causticity and wit.    From Wordnik.com.  [Robert Elsmere] Reference

"If it had been with his mother instead of himself," answered Oldbuck, with his usual dry causticity of humour, "I could see an excellent reason for it.    From Wordnik.com.  [The Antiquary — Complete] Reference

“If it had been with his mother instead of himself,” answered Oldbuck, with his usual dry causticity of humour, “I could see an excellent reason for it.    From Wordnik.com.  [The Antiquary] Reference

I wish for a little of the old Scotch causticity.    From Wordnik.com.  [The Journal of Sir Walter Scott From the Original Manuscript at Abbotsford] Reference

A little fear at their causticity.    From Wordnik.com.  [Devereux — Complete] Reference

"It was causticity.    From Wordnik.com.  [KELOLAND.COM: News, Weather and Sports] Reference