A venomous American spider, Loxosceles reclusa, that has a mark on its back in the shape of a violin.

A brown paperbag. / (idiomatic) A short presentation or seminar on a given subject, especially one given at lunchtime.

To carry one's lunch from home, as in a bag, rather than purchase it from a cafeteria or restaurant.

(idiomatic) One who brownnoses (flatters or humors somebody in an obsequious manner for personal gain); one who sucks up; a bootlicker, ass-kisser, sycophant.

(idiomatic, dated) A melancholy mood accompanied by deep thought; a moody daydream.

Sugar which has been only partially refined and still contains molasses. / Refined sugar to which molasses has been added. / (slang) Heroin. / (slang) An attractive black woman.

plural of brown dwarf

(astronomy) A starlike object that contracts to about the volume of the planet Jupiter after its formation phase; its mass may range from several times that of Jupiter, such that it fuses deuterium, up to just below the threshold of sustained hydrogen fusion.

plural of brown dwarf

The orbital ridge of the eye.