or si·num·bral lamp
[ si-nuhm-bruh ]
/ sɪˈnʌm brə /
an unshaded sperm-oil lamp consisting of a translucent glass globe supported on a pedestal: a form of astral lamp.
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. 2019