ˌsemi-nocˈturnal, a. Astr.
[semi- 6 b.]
Pertaining to, or accomplished in, half a night.
| 1594, 1664 [see semi-diurnal 1]. 1660 H. More Myst. Godl. vii. xv. 342 The seminocturnal archs of the Ascension of the Ecliptick. 1679 Moxon Math. Dict. 87 By the help thereof [the Meridian], is found..the..Seminocturnal Arch of any Star. 1819 J. Wilson Dict. Astrol. 49 Subtract the seminocturnal arc of the star from its oblique ascension. |