spicula

1. 1.

   A thrusting javelin used by Romans that replaced the pilum in the late 3rd century.

   古罗马的一种投掷标枪,公元3世纪后期取代皮鲁姆

2. 2.

   A sharp, pointed crystal, especially of ice.

   尖锐的晶体,尤指冰晶

3. 3.

   A sharp, needle-like structure, especially those making up the skeleton of a sponge.

   尖锐的针状结构,尤指构成海绵骨架的针状体

4. 4.

   A small radial emission of gas seen in the chromosphere and corona of the sun.

   太阳色球层和日冕中的针状体

尖锐的晶体,尤指冰晶；尖锐的针状结构,尤指构成海绵骨架的针状体；太阳色球层和日冕中的针状体；(海参的)骨片；(线虫的)交合刺

Connections

Learner notes