Word of the day

Lambda – the eleventh letter of the Greek alphabet (Λ, λ), transliterated as ‘l’, the eleventh star in a constellation; a  type of bacteriophage virus used in genetic research; the point at the back of the skull where the parietal bones and the occipital bone meet; denoting one of the two types of light polypeptide chain present in all immunoglobulin molecules.