n.

1. 珊瑚[U]
   Coral is often used for making jewellery.

   珊瑚常用来制作首饰。

2. 珊瑚虫[C]
3. 珊瑚制品，珊瑚饰物[C]
4. 珊瑚红，橘红色[U]
5. 龙虾卵[C]

a.

1. 珊瑚的；珊瑚制的
   Kate is wearing a coral necklace.

   凯特戴着一条珊瑚项链。

2. 珊瑚色的，橘红色的
3. 产珊瑚的

n.

1. a hard stony substance secreted by certain colonial marine animals as an external skeleton, typically forming large reefs.
   ▸precious red coral, used in jewellery.
2. the pinkish-red colour of red coral.
3. an anthozoan of a large group including those that form coral reefs, secreting a calcareous, horny, or soft skeleton. [Orders Scleractinia or Madreporaria (the reef-forming stony corals), Alcyonacea (soft corals), and Gorgonacea (horny corals).]
4. the edible unfertilized roe of a lobster or scallop, reddening when cooked.