XXX

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XXX, XXXX, XXXXX

[fôreks′, fīveks′]
the designations for abnormal sex chromosome complements in the human female in which there are, respectively, three, four, or five instead of the normal two X chromosomes so that each somatic cell contains a total of 47, 48, or 49 chromosomes. Although there is no consistent phenotype associated with such aberrations, the risk of congenital anomalies and mental retardation in the affected individual increases significantly as the number of X chromosomes increases.

XXX

adjective Popular slang for X-rated.

XXX

symbol for a chromosomal aberration found in mares and cows in which there is infertility because of ovarian hypoplasia.
References in classic literature ?
Bowman, finding he could not succeed at this time, retreated about thirty miles.
The only members of the family known to be extant were, first, the Judge himself, and a single surviving son, who was now travelling in Europe; next, the thirty years' prisoner, already alluded to, and a sister of the latter, who occupied, in an extremely retired manner, the House of the Seven Gables, in which she had a life-estate by the will of the old bachelor.
For more than thirty years he has been the "candid friend" of the business, incessantly suggesting, probing, and criticising.
This maneuver gave me a considerable advantage, and I was able to reach the city quite a bit ahead of him, and as he came tearing after me I jumped for a window about thirty feet from the ground in the face of one of the buildings overlooking the valley.
Food of no sort had passed her lips in more than thirty hours, and her last meal had been a scanty breakfast of dry bread.
A day and a half spent in rummaging amongst certain dens of Paris sufficed for his recruiting; and, without allowing his adventurers to communicate with each other, he had picked up and got together, in less than thirty hours, a charming collection of ill-looking faces, speaking a French less pure than the English they were about to attempt.
Troop went down solemnly into the cabin, where he and the older men bunked, leaving Dan to comfort the luckless heir to thirty millions.
Fanny Beaufort, who had appeared in New York at eighteen, after the death of her parents, had won its heart much as Madame Olenska had won it thirty years earlier; only instead of being distrustful and afraid of her, society took her joyfully for granted.
There are about thirty cases on record, of which the most famous, that of the Countess Cornelia de Baudi Cesenate, was minutely investigated and described by Giuseppe Bianchini, a prebendary of Verona, otherwise distinguished in letters, who published an account of it at Verona in 1731, which he afterwards republished at Rome.
Apparently he had not aged a minute, but was still the straight, clean-limbed fighting-man of thirty.
The second that we shall mention is the tyranny of the Cypselidse, at Corinth, which continued seventy-seven years and six months; for Cypselus was tyrant there thirty years, Periander forty-four, and Psammetichus, the son of Georgias, three years; the reason for which was, that Cypselus was a popular man, and governed without guards.
This island, lying near to the eastern coast of Africa, is in the sixth degree of south latitude, that is to say, four hundred and thirty geographical miles below the equator.