| 释义 |
black drop
1. Med. A dark-coloured liquid medicine, chiefly composed of opium, with vinegar and spices.
1823Byron Juan ix. lxvii, A quintessential laudanum or ‘black drop.’ 1878Cycl. Med. XVII. 844 Black drops, Godfrey's Elixir..etc. all contain opium.
2. Astron. A dark drop-like appearance observed at solar transits of Venus and Mercury immediately after apparent internal contact at ingress, and before it at egress, giving to the planet a pear-shaped appearance, elongated towards the sun's edge.
1869E. Dunkin Midn. Sky 252 The formation of the black-drop..was very clearly observed at..Greenwich. 1878Newcomb Pop. Astron. ii. iii. 189 Father Hell's black drop, seen before the limbs [of Sun and Venus] were in contact. |