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Definition of rho

rho

/roʊ/
rho
Plural:rhos
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rho Lexical Profile

rho Game Scores & Validity

• noun

1

The seventeenth letter of the Greek alphabet (Ρ, ρ), transliterated in the Roman alphabet as 'r' or 'rh'.

Example

"Because the uppercase Greek letter rho looks identical to the Latin letter P, students new to the alphabet often misread it."

2

A symbol (ρ) used in physics, chemistry, and statistics to represent various quantities, most commonly mass density, electrical resistivity, or Spearman's rank correlation coefficient.

Example

"In the fluid dynamics equation, the lowercase rho represents the density of the liquid."

• Rhymes for rho

• Nearby Words

rhinoplasty
rhipsalidopsis
rhipsalis
rho
rhodanthemum
rhodesia
rhodiola

Word Origin & Etymology

Borrowed from Ancient Greek ῥῶ (rhô), which derives from the Phoenician letter resh (𐤓), meaning 'head'.

Cite this Entry

Wordmom. (2026). Definition of Rho. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/rho
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