Thecla \Thec"la\, n. Any one of many species of small delicately colored butterflies belonging to Thecla and allied genera; -- called also hairstreak, and elfin.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Elfin \Elf"in\ (-[i^]n), a. Relating to elves.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Elfin \Elf"in\, n. A little elf or urchin. --Shenstone.

Source: Webster's Revised Unabridged Dictionary (1913)