tau

The 19th letter of the Greek alphabet.

In ichthyology, the toadfish, Batrachus tau.

In entomology: A beetle.

A phalænid moth.

A fly.

In heraldry, same as tau-cross.

The nineteenth letter (Τ, τ) of the Greek alphabet, equivalent to English t.

The common American toadfish; — so called from a marking resembling the Greek letter tau (τ).

See Illust. 6, of Cross.

The name of the letter T/τ in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the Classical and Modern Greek, the twentieth letter of Old and Ancient Greek.