▪ I. † ˈsiderous, a.1 Obs.—1
[f. L. sīder-, sīdus star.]
Star-like, sidereal.
| 1646 Sir T. Browne Pseud. Ep. iii. xi. (1686) 104 The mystical conjunction of Hawk and Lion, implying the genial or the syderous Sun. |
▪ II. siderous, a.2 rare.
[f. Gr. σίδηρος iron.]
Having the qualities of iron; ferreous.
| 1811 Pinkerton Petral. Introd. p. xxxviii, The siliceous, the argillaceous, the magnesian [earths]; contemporary with which two last, was that of the ferruginous, or..siderous. Ibid. I. i. Domain 1. Siderous. |