lase

 : 
Verb (intransitive)

CIDE DICTIONARY

lasev. i. [by back-formation from laser. See laser.].
     To give off a beam of coherent light; -- of a laser.  [PJC]

OXFORD DICTIONARY

lase, v.intr.
1 function as or in a laser.
2 (of a substance) undergo the physical processes employed in a laser.

Etymology
back-form. f. LASER

For further exploring for "lase" in Webster Dictionary Online


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