Examples of “phi” in a Sentence

noun The 21st letter of the Greek alphabet (Φ, φ), often used as a symbol in science and mathematics.

• Phi is the Greek letter that looks like a circle crossed by a vertical line.
• The physics student wrote phi on the board to stand for the angle.
• In the equation, phi represents the phase angle.

noun The golden ratio, approximately 1.618, often represented by this letter.

• Many artists say that phi creates a pleasing balance in a painting.
• The math teacher showed how phi appears when you divide a line into two special parts.
• The proportions of the building were designed around phi.