sinumbraadj.
? Obsolete.
sinumbra lamp n. (see quot. 1852).
ΘΚΠ
the world > matter > light > artificial light > an artificial light > artificial light defined by light-source > [noun] > oil-lamp > sinumbra lamp
sinumbra lamp1834
1834 M. Scott Cruise of Midge iii, in Blackwood's Edinb. Mag. May 606/2 A mild radiance, like that cast by the ground glass globe of a sinumbra lamp.
1852 C. Tomlinson Cycl. Useful Arts (1854) II. 107/1 In Phillips's Sinumbra lamp..the shadow if not destroyed is rendered imperceptible by the peculiar form given to the circular oil vessel.
Derivatives
siˈnumbral adj.
ΚΠ
1839 Civil Engineer & Architect's Jrnl. 2 329/2 Sinumbral and pneumatic fountain lamps.
1854 Lardner's Museum Sci. & Art II. 207 The old English ring-lamp called the Sinumbral lamp.
This entry has not yet been fully updated (first published 1911; most recently modified version published online March 2021).
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adj.1834