sinumbra lamp
or si·num·bral lamp
[si-nuhm-bruh]
- an unshaded sperm-oil lamp consisting of a translucent glass globe supported on a pedestal: a form of astral lamp.
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Origin of sinumbra lamp
1825–35; < Latin sin(e) without + umbrā shade, shadow
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018