Thursday, 8 June 2017

ψ | psi

The letter ψ (psi) was yet another Greek addition to the alphabet, placed after the letters of Phoenician origin, along with φ, χ and ω. According to Wikipedia,

The letter’s origin is uncertain. It may or may not derive from the Phoenician alphabet. It appears in the 7th century BC, expressing /ps/ in the Eastern alphabets, but // in the Western alphabets (the sound expressed by Χ in the Eastern alphabets).

The letter ψ has a number of uses in maths and sciences, such as:

More photos of letters, numbers and sea glass @ Shutterstock.

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