(astronomy, astrophysics) Particles of matter that cannot be detected by their radiation but whose presence is inferred from gravitational effects.

(astronomy, astrophysics) A hypothetical form of energy which, it is supposed, is spread uniformly throughout space (and time) and has anti-gravitational properties: it represents a possible mechanism for the cosmological constant, and thus is one of the possible explanations for the current accelerating rate of expansion of the universe; and it is estimated to account for about 74% of the mass-energy of the universe.

plural of dark meat

(uncountable) Satan; the Devil. / (by extension, countable) A particularly evil person. / Used other than figuratively or idiomatically: see prince, darkness.

(criminology, statistics) The estimated number of unreported criminal cases.

(idiomatic) A guess, attempt, or choice made with little or no evidence or knowledge.

(Norse mythology) A member of the race of Dǫkkálfar, creatures who live underground.

(now chiefly historical) A lantern with a panel that slides to block the light.

The legs, thighs and wings of poultry. / (slang, vulgar, uncountable) A black person, regarded as a sex partner.

(uncountable) Chocolate that has not had milk products added to lighten and sweeten it. / (countable) A serving or a variety of this chocolate.