그리스 알파벳의 18번째 글자.
The eighteenth letter of the Greek alphabet (Σ, σ).
예문:
"The lowercase sigma has two different forms in Greek writing."
"The scientist labeled the graph with a sigma."
수열의 합을 나타내는 수학 기호.
A mathematical symbol (Σ) used to denote the sum of a series.
예문:
"The formula uses a sigma to represent the total sum."
"Calculate the value following the sigma symbol."
통계학에서 모집단의 표준 편차를 나타내는 기호.
A symbol (σ) representing the standard deviation of a population.
예문:
"A low sigma value indicates that the data points are close to the mean."
"The Six Sigma methodology focuses on process improvement."
기묘도가 0이 아닌 불안정한 중입자군.
Any of a group of unstable elementary particles (baryons) with a non-zero strangeness.
예문:
"The decay of a sigma particle was observed in the chamber."
"Physicists studied the properties of the sigma baryon."
원자 궤도 함수의 중첩으로 형성된 결합이나 궤도.
Relating to a covalent bond or orbital formed by the head-on overlap of atomic orbitals.
예문:
"A single bond is typically a sigma bond."
"The sigma orbital has zero angular momentum."
별자리에서 18번째로 밝은 별을 지칭하는 명칭.
The eighteenth star in a constellation, usually designated by the Greek letter sigma.
예문:
"Sigma Octantis is the current South Star."
"The star chart identifies the 18th star as sigma."