Australian. A large, usually rounded and blackened lump of coral projecting or detached from a reef; = niggerhead, n. 2.
| 单词 | θ4989 |
| 释义 | the world > the earth > structure of the earth > structural features > rock formations > [noun] > niggerhead or woolpack (3) negrohead1814 Australian. A large, usually rounded and blackened lump of coral projecting or detached from a reef; = niggerhead, n. 2. niggerhead1847 (a) Chiefly U.S. Any of various kinds of (frequently hard or black) rock, stone, etc. (see quots.); (also) gen. a hard stone. Also niggerhead stone… woolpack1848 transferred. Something resembling a woolpack. plural. Masses of Wenlock limestone. local. |
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