Strong’s Hebrew
H3975 — muwrah
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
מְאוּרָה
muwrah — pronounced meh-oo-raw
feminine passive participle of 215; something lighted, i.e. an aperture; by implication, a crevice or hole (of a serpent):--den. see H0215
1 occurrence in the KJV.
Isaiah 11:8
And the sucking child shall play on the hole of the asp, and the weaned child shall put his hand on the cockatrice’ den.