(informal, idiomatic) Raw petroleum; crude oil. / Black pepper, in the context of being a historically valuable spice.

A common species of rat, Rattus rattus, originating anciently in Asia but now distributed worldwide.

European black pine, Pinus nigra / Japanese black pine, Pinus thunbergii / Jeffrey pine, Pinus jeffreyi / Prumnopitys taxifolia, matai, a New Zealand conifer.

A large forest and mountain range in southwestern Germany.

(US) Any one of a series of laws, passed before the American Civil War, sharply discriminating against free blacks who wished to emigrate to a northern state and become citizens there.

Iron, or similar metals worked by a blacksmith

(martial arts) The highest belt colour in various martial arts. / (martial arts) Someone who has attained the black belt in martial arts. / (figuratively, colloquial) Great skill in any field.

(US, southern) A geographic region where the residents are predominantly or exclusively African-American.

(geology) A dark, muddy rock, rich in sulfides and organic material.

A plant belonging to either of two closely related species, Rubus leucodermis or Rubus occidentalis, both native to North America. / Rubus coreanus, native to Korea, Japan, and China