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Grain Size

Phi is a symbol used when describing grain size in sedimentology. Wentworth and Krumbian scales both use φ to describe the size of individual sediment particles.

This should be added to the list of scientific measurements that utilize phi.

See more here: /info/en/?search=Grain_size

alternate symbol

the first line "lowercase φ or ϕ" shows two identical symbols on my computer and it's not clear how they are distinguished. i'm not sure how you could guarantee that both different symbols are shown.

Semi-protected edit request on 10 January 2023

CHANGE "In philosophy, φ is often used as shorthand for a generic act. (Also in uppercase.)" to "In philosophy, φ (or Φ) is often used as shorthand for a generic act."

Applimu ( talk) 23:27, 10 January 2023 (UTC) reply

 Not done: The section is specifically split up into two sections: lowercase and uppercase, so I believe the note is sufficient, especially as it is listed in both sections. ~ Eejit43 ( talk) 14:55, 17 January 2023 (UTC) reply