The Collaborative International Dictionary of English v.0.48:

Etna \Et"na\, n.
   A kind of small, portable, cooking apparatus for which heat
   is furnished by a spirit lamp.
   [1913 Webster]

         There should certainly be an etna for getting a hot cup
         of coffee in a hurry.                    --V. Baker.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Etna
    n 1: an inactive volcano in Sicily; last erupted in 1961; the
         highest volcano in Europe (10,500 feet) [syn: Etna,
         Mount Etna, Mt Etna]
    2: a gas burner used in laboratories; has an air valve to
       regulate the mixture of gas and air [syn: bunsen burner,
       bunsen, etna]

U.S. Gazetteer Places (2000):

Etna, WY -- U.S. Census Designated Place in Wyoming
   Population (2000):    123
   Housing Units (2000): 55
   Land area (2000):     1.959234 sq. miles (5.074393 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.959234 sq. miles (5.074393 sq. km)
   FIPS code:            25475
   Located within:       Wyoming (WY), FIPS 56
   Location:             43.031124 N, 111.016042 W
   ZIP Codes (1990):     83118
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Etna, WY
    Etna


U.S. Gazetteer Places (2000):

Etna, CA -- U.S. city in California
   Population (2000):    781
   Housing Units (2000): 362
   Land area (2000):     0.788999 sq. miles (2.043499 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.788999 sq. miles (2.043499 sq. km)
   FIPS code:            22972
   Located within:       California (CA), FIPS 06
   Location:             41.457350 N, 122.896875 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Etna, CA
    Etna


U.S. Gazetteer Places (2000):

Etna, PA -- U.S. borough in Pennsylvania
   Population (2000):    3924
   Housing Units (2000): 1934
   Land area (2000):     0.746751 sq. miles (1.934076 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.746751 sq. miles (1.934076 sq. km)
   FIPS code:            24160
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             40.500338 N, 79.948755 W
   ZIP Codes (1990):     15223
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Etna, PA
    Etna