black jack

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black jack^¹

noun black jacks

countable, uncountable Any of certain species of Caranx of gamefish, including C. latus and C. crysos, but especially Caranx lugubris.
countable, uncountable Certain beggarticks (Bidens spp.), especially Bidens pilosa.
countable, obsolete, uncountable Larva of a turnip sawfly (Athalia rosae) There is a sort of black caterpillar called a black jack, which is seldom seen; but when they do come, they make terrible havock.
Similar: black canker, black palmer, nigger
countable, uncountable Sphalerite.
countable, uncountable A tufted or ring-necked scaup duck (Aythya collaris).
alternative, countable, uncountable Alternative form of blackjack
countable, uncountable Used other than figuratively or idiomatically: see black, jack.

Black Jack^²

proper noun

A city in Saint Louis County, Missouri, United States, named for a grove of blackjack oaks.

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MLA

"black jack." Wiktionary, via Micwyn, micwyn.com/word/black%20jack. Accessed 6 Nov. 2026.

APA

black jack. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/black%20jack

Chicago

"black jack." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/black%20jack.

BibTeX

@misc{black_jack_2026,
  title = {black jack},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/black%20jack},
  urldate = {2026-11-06}
}