Definition

Noun: 1. The 10th letter of the Greek alphabet (Κ, κ): Kappa is a letter in the Greek alphabet, positioned between iota (Ι, ι) and lambda (Λ, λ). It corresponds to the letter "K" in the Roman alphabet. 2. (In physics and engineering) A symbol for various constants and measures: The lowercase kappa (κ) is often used as a symbol to represent specific physical quantities, such as the curvature of a curve or a constant in certain equations.

Usage Examples

• The word "kilometer" is sometimes abbreviated using the Greek letter (κ) in scientific contexts.
• In the Greek numeral system, represents the number 20.
• The physicist used the symbol to denote the thermal conductivity in the formula.

Advanced Usage

• In statistics: Kappa (κ) is used in Cohen's kappa coefficient, a statistical measure of inter-rater reliability or agreement for categorical items.
  • Example: The researchers calculated a kappa statistic to assess the agreement between the two diagnosticians.
• In cosmology: Kappa is used in the Einstein field equations in the form of the Einstein constant (κ).
  • Example: The constant kappa relates the geometry of spacetime to the energy and momentum within it.

Variants and Related Words

• Greek Alphabet: Kappa is one specific member of this set of letters. Other letters include alpha (Α, α), beta (Β, β), gamma (Γ, γ), etc.
• K: The Roman or Latin alphabet equivalent of the Greek kappa.

Synonyms

• Tenth Greek letter: A descriptive synonym.
• Κ / κ: The literal symbol for the letter.

Related Phrases

• Kappa particle: (Biology) A cytoplasmic symbiotic particle found in some strains of the protozoan .
  • Example: The presence of the kappa particle determines the killer trait in certain paramecia.
• Kappa casein: (Biochemistry) A type of protein found in milk, part of the casein family.
  • Example: Kappa casein plays a crucial role in the curdling of milk during cheese production.

Noun

1. the 10th letter of the Greek alphabet