Of or relating to the stars. / (astronomy) Relating to a measurement of time relative to the position of the stars.

Alternative form of sidereal

(obsolete) sidereal

(obsolete) planet-struck; blasted.

simple past tense and past participle of siderate

(obsolete) The state of being siderated, or planet-struck. / (obsolete) A blast or blight in plants. / (obsolete) A sudden and apparently causeless stroke of disease, as in apoplexy or paralysis.

plural of sider

One who takes a side.

Obsolete form of cider.

In a sidereal manner.