The Collaborative International Dictionary of English v.0.48:
Moth \Moth\, n.; pl. Moths (m[o^]thz). [OE. mothe, AS.
mo[eth][eth]e; akin to D. mot, G. motte, Icel. motti, and
prob. to E. mad an earthworm. Cf. Mad, n., Mawk.]
1. (Zool.) Any nocturnal lepidopterous insect, or any not
included among the butterflies; as, the luna moth; Io
moth; hawk moth.
2. (Zool.) Any lepidopterous insect that feeds upon garments,
grain, etc.; as, the clothes moth; grain moth; bee moth.
See these terms under Clothes, Grain, etc.
3. (Zool.) Any one of various other insects that destroy
woolen and fur goods, etc., esp. the larvae of several
species of beetles of the genera Dermestes and
Anthrenus. Carpet moths are often the larvae of
Anthrenus. See Carpet beetle, under Carpet,
4. Anything which gradually and silently eats, consumes, or
wastes any other thing.
Moth blight (Zool.), any plant louse of the genus
Aleurodes, and related genera. They are injurious to
Moth gnat (Zool.), a dipterous insect of the genus
Bychoda, having fringed wings.
Moth hunter (Zool.), the goatsucker.
Moth miller (Zool.), a clothes moth. See Miller, 3,
Moth mullein (Bot.), a common herb of the genus Verbascum
(Verbascum Blattaria), having large wheel-shaped yellow
or whitish flowers.