a mirror or reflector, especially one of polished metal, as on a reflecting telescope.
Surgery. an instrument for rendering a part accessible to observation, as by enlarging an orifice.
Ornithology. a lustrous or specially colored area on the wings of certain birds.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use speculum in a sentence
He studied science when he could, and hired a telescope, until he learnt to make his own specula and telescopes.History of Astronomy | George Forbes
Vaginal and rectal specula have been found: also a forceps for removing fractured pieces of bone from the surface of the brain.Outlines of Greek and Roman Medicine | James Sands Elliott
The Specula Melitensis Encyclica gives an account of a kind of calculating machine of his invention.
This artifice of a double melting is often had recourse to, and especially in casting the alloys for the specula of telescopes.A Dictionary of Arts, Manufactures and Mines | Andrew Ure
I know of a gentleman who made a hundred of these specula with his own hands.The Vast Abyss | George Manville Fenn
British Dictionary definitions for speculum
a mirror, esp one made of polished metal for use in a telescope, etc
med an instrument for dilating a bodily cavity or passage to permit examination of its interior
a patch of distinctive colour on the wing of a bird, esp in certain ducks
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012