| Asteridian | a. (Zool.) Of or pertaining to the Asterioidea. -- |
| steradian | (n) the unit of solid angle adopted under the Systeme International d'Unites, Syn. sr |
| ステラジアン | [suterajian] (n) steradian [Add to Longdo] |
| 補助単位 | [ほじょたんい, hojotan'i] (n) (1) (obs) prefixed unit of measurement (i.e. millimeter, kilogram, etc.); (2) (See 組立単位) supplementary SI unit (radian and steradian) [Add to Longdo] |