n.
Pronunciation: ' spe-ky ə -l ə m
Function: noun
Inflected Form: plural -la \ -l ə \ also -lums
Etymology: Middle English, from Latin, mirror, from specere
Date: 15th century
1 : an instrument inserted into a body passage especially to facilitate visual inspection or medication
2 : a drawing or table showing the relative positions of all the planets (as in an astrological nativity)
3 : a patch of color on the secondaries of most ducks and some other birds