the tenth letter of the Greek alphabet (K, κ), transliterated as ‘k’ 希腊字母表中第十个字母(译写为k) ■(Kappa)[followed by Latin genitive](Astronomy)the tenth star in a constellation (天文)κ星(星座中第十颗星) Kappa Orionis. 猎户座κ星。 ■[as modifier](Biochemistry)denoting one of the two types of light polypeptide chain present in all immunoglobulin molecules (the other being lambda) (生化)κ链