Letter T

Triplet

One of three, as: 1. One of three babies in a multiple birth.

Or three animals gestated together.

2. In genetics, a set of three bases in DNA.

Also called a codon.

See: Crick-Brenner experiment.

3. In optics, a combination of three simple lenses cemented together. The word triplet came into use in the mid-17th century.

It was formed from triple, just as doublet was formed from double

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