a. [f. JET sb.1 + BLACK a.] Black like jet; absolutely black; glossy black.

1

c. 1475.  Bk. of Curtesye, 45 (Oriel MS.). Youre nayles loke they be not geet blake.

2

1693.  Tate, in Dryden’s Juvenal, ii. (1697), 32. With Jet-black Pencils one his Eye-brows dyes.

3

1777.  Potter, Æschylus, Persians, 478. That led his dark’ning squadrons … On jet-black steeds.

4

1875.  W. S. Hayward, Love agst. World, 100. Balthazar was jet black.

5