Webster's Revised Unabridged Dictionary · 1913

chamaeleon

chamaeleon , noun

[Latin Chamaeleon, Greek chamaile`wn, lit., “ground lion;” chamai` on the ground + le`wn lion.]

(Zoology) a lizard of Africa and Madagascar able to change skin color and having a projectile tongue.
ground lion;

Chamaeleon , noun

(Astronomy) a small constellation in the southern skies between Hydrus and Musca.