(chemistry, physics) A chip, combining semiconductor and microfluidics technologies, capable of handling and analyzing very small quantities of sample, especially of bodily fluids for medical purposes.

(informal, physics) entropic doom of a universe

(Britain, slang, dated, sometimes as a term of address) An old friend; an old chap or fellow.

plural of man-of-war

A promise, or a pledge of one's good faith.

The correlation of longevity with validity of an idea or trend.

(Christianity) The gift of the Holy Spirit. / (Christianity) Tribulation endured as spiritual discipline. / (Christianity) Martyrdom by immolation.

(Australia, vulgar, slang) Vicious, aggressive, intimidating. / (Australia, Britain, vulgar, slang) Dissuasively or intimidatingly large; massive.

(Australia, vulgar, slang) Excessively

(idiomatic) A person who is experienced at a certain activity.