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sinumbra lamp

American  
[si-nuhm-bruh] / sɪˈnʌm brə /
Or sinumbral lamp

noun

  1. an unshaded sperm-oil lamp consisting of a translucent glass globe supported on a pedestal: a form of astral lamp.

Etymology

Origin of sinumbra lamp

1825–35; < Latin sin ( e ) without + umbrā shade, shadow

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.