• WordNet 3.6
    • n triplet a set of three similar things considered as a unit
    • n triplet one of three offspring born at the same time from the same pregnancy
    • n triplet the cardinal number that is the sum of one and one and one
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The average weight of a newborn baby is 7 lbs. 6 oz. For a triplet baby it is 3 lbs. 12 oz
    • Triplet A collection or combination of three of a kind; three united.
    • Triplet (Mus) A group of three notes sung or played in the tree of two.
    • Triplet Three children or offspring born at one birth.
    • Triplet (Poetry) Three verses rhyming together.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: There are about 125 million multiples (twins, triplets, etc.) worldwide
    • n triplet A bicycle for three riders.
    • n triplet A collection or combination of three of a kind, or three united.
    • n triplet In poetry, three verses or lines riming together.
    • n triplet In music, a group of three tones to be performed in the time of two or four. Such groups are marked. . Compare sextuplet, decimole, etc.
    • n triplet A combination of three plano-convex lenses in a compound microscope, which serves to render the object clear and distinct, and free from distortion—an improvement upon the doublet (see doublet, 2); also, a hand-microscope consisting of three double-convex lenses.
    • n triplet In mathematics, a system of three families of surfaces such that one of each family passes through each point of space.
    • n triplet One of three children born at one birth.
    • n triplet plural Three links of chain, generally used to connect the cable with the anchor-ring.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: The number of triplets born in the US in 1994 (4,594) was more than triple the number born in 1971 (1,034), an increase attributed to older age of the mothers and the use of fertility-enhancing drugs and techniques.
    • n Triplet three of a kind, or three united: three lines rhyming together: :
    • n Triplet (mus.) a group of three notes occupying the time of two, indicated by a slur and the figure 3
    • n Triplet (coll.) one of three children born at one birth
    • ***


Webster's Revised Unabridged Dictionary
From Triple
Chambers's Twentieth Century Dictionary
Fr.,—L. tri-plustri-, tres, three, -plus, akin to Eng. -fold.


In literature:

Twins and triplets are unknown in Sistan, or so I was assured.
"Across Coveted Lands" by Arnold Henry Savage Landor
You're a soft-headed triplet yourself!
"The Hoosier School-boy" by Edward Eggleston
Out of 48,000 cases of labor in the Royal Maternity Charity in London, only three triplets occurred.
"The Physical Life of Woman:" by Dr. George H Napheys
Triplets, in mercy to our paternal feelings, Mr. Giovannelli spared us.
"Mystic London:" by Charles Maurice Davies
Towards the evening he asked his wife not to bring the triplets to the library as usual, as he had to see some one on business.
"A Coin of Edward VII" by Fergus Hume
Nor are either of these triplets inconsistent with some reasonable view of what may be meant by the Christian Trinity.
"Life and Matter" by Oliver Lodge
All the triplets were living and apparently doing well.
"Complete Story of the San Francisco Horror" by Richard Linthicum
The unit of form is the couplet or triplet of verse: see above, page 242.
"Select Masterpieces of Biblical Literature" by Various
It is accessible by a vaulted passage, which leads to a triplet gateway, with deep mouldings, which opens into the first court.
"Museum of Antiquity" by L. W. Yaggy
The specific gravity of the triplet is practically that of emerald, its color is often very good, and it is doubly refracting.
"A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public" by Frank Bertram Wade

In poetry:

"A Triplet of Quatrains." To deftly do what many dimly think;
To fund a feeling for the world to borrow;
To turn a tear to printer's ink;
To make a sonnet of a sorrow.
"Poetry" by Edmund Vance Cooke
Above the mist, the sun has kissed
Our Eildons, one yet three:
The triplet smiles, like glittering isles
Set in a silver sea.
Break, glades of morn; burst, hound and horn;
Oh then their woods for me!
"Song The Ninth" by Thomas Aird

In news:

According to Washington State University the College of Veterinary medicine says that one in 105,000 are the odds of live-birth of Angus triplets .
1 triplet 's condition upgraded after NJ bus crash.
The Cardwell triplets were born on May 18, 1899, near Waco, and moved to the Sweetwater area when they were young.
These triplets are six weeks old.
Triplet Cubs Click to enlarge.
I'm wondering if it was the same Doe to be lucky enough to birth multiple sets of triplets .
Triplet Fawns Click to enlarge.
I had these three adorable triplet fawns visiting my back yard the other day.
Vicki and Sarah are two of the three triplets featured in "Playboy Magazine" in 2007 and as cyber playmates.
Triplet QBs bucking history.
Infant triplets were saved thanks to this pair, as well as Bethesda Naval Firefighter Jody Sealey and Montgomery County Capt.
Visitors can see the triplet cubs in Predator Ridge during the next few months of their temporary stay.
(CBS) A set of 21-year-old Michigan triplets, convicted of felonies for two separate crimes, could end up together in the same prison.
Did TV news exploit the triplets tragedy.
I've been going through the process of mounting a budget 32-inch LCD in the triplets' bedroom.

In science:

Definition 1. A random point field is a triplet (X, B, P ) where P is a probability measure on (X, B).
Determinantal random point fields
We shall assume that the triplet one–form φ shares the spacetime symmetries, i.e. it depends on the variables u and v only.
A class of colliding waves in metric-affine gravity, nonmetricity and torsion shock waves
In region I I , the metric components and the triplet one–form depend only on v i.e. g = g(0, v), A = A(0, v), and φ = φ(0, v).
A class of colliding waves in metric-affine gravity, nonmetricity and torsion shock waves
The grid positions are ~x( ~m ) = (L/M ) ~m where ~m is an integer triplet with components mi ∈ [0, M ).
Multiscale Gaussian Random Fields for Cosmological Simulations
In this section, we consider a network where each node is associated to a triplet (k , η , ζ ).
Growing Random Networks with Fitness