The Collaborative International Dictionary of English v.0.48:

Hooper \Hoop"er\, n. (Zool.) [So called from its note.]
   The European whistling, or wild, swan (Olor cygnus); --
   called also hooper swan, whooping swan, and elk. Hoopoe

The Collaborative International Dictionary of English v.0.48:

Whistling \Whis"tling\,
   a. & n. from Whistle, v.
   [1913 Webster]

   Whistling buoy. (Naut.) See under Buoy.

   Whistling coot (Zool.), the American black scoter.

   Whistling Dick. (Zool.)
   (a) An Australian shrike thrush (Colluricincla Selbii).
   (b) The song thrush. [Prov. Eng.]

   Whistling duck. (Zool.)
   (a) The golden-eye.
   (b) A tree duck.

   Whistling eagle (Zool.), a small Australian eagle
      (Haliastur sphenurus); -- called also whistling hawk,
      and little swamp eagle.

   Whistling plover. (Zool.)
   (a) The golden plover.
   (b) The black-bellied, or gray, plover.

   Whistling snipe (Zool.), the American woodcock.

   Whistling swan. (Zool.)
   (a) The European whooper swan; -- called also wild swan,
       and elk.
   (b) An American swan (Olor columbianus). See under Swan.


   Whistling teal (Zool.), a tree duck, as Dendrocygna
      awsuree of India.

   Whistling thrush. (Zool.)
   (a) Any one of several species of singing birds of the genus
       Myiophonus, native of Asia, Australia, and the East
       Indies. They are generally black, glossed with blue, and
       have a patch of bright blue on each shoulder. Their note
       is a loud and clear whistle.
   (b) The song thrush. [Prov. Eng.]
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

elk \elk\, elke \elke\, n. (Zo["o]l.)
   The European wild or whistling swan (Cygnus ferus).
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Elk \Elk\ ([e^]lk), prop. n.
   a member of the fraternal organization named Benevolent and
   Protective Order of Elks, supporting various services to
   their communities.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

elk \elk\ ([e^]lk), n. [Icel. elgr; akin to Sw. elg, AS. eolh,
   OHG. elaho, MHG. elch, cf. L. alces; perh. akin to E. eland.]
   (Zo["o]l.)
   A large deer, of several species. The European elk Alces
   alces (formerly Alces machlis or Cervus alces) is
   closely allied to the American moose. The American elk, or
   wapiti (Cervus Canadensis) the largest member of the deer
   family, has large, spreading antlers and is closely related
   to the European stag. See Moose, and Wapiti.
   [1913 Webster +PJC]

   Irish elk (Paleon.), a large, extinct, Quaternary deer
      (Cervus giganteus) with widely spreading antlers. Its
      remains have been found beneath the peat of swamps in
      Ireland and England. See Illustration in Appendix; also
      Illustration of Antler.

   Cape elk (Zo["o]l.), the eland. elk

WordNet (r) 3.0 (2006):

elk
    n 1: large northern deer with enormous flattened antlers in the
         male; called `elk' in Europe and `moose' in North America
         [syn: elk, European elk, moose, Alces alces]
    2: large North American deer with large much-branched antlers in
       the male [syn: wapiti, elk, American elk, Cervus
       elaphus canadensis]
    3: common deer of temperate Europe and Asia [syn: red deer,
       elk, American elk, wapiti, Cervus elaphus]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "elk":
   Cape elk, Virginia deer, antelope, buck, camel, camelopard,
   caribou, deer, deerlet, doe, dromedary, eland, fallow deer, fawn,
   gazelle, giraffe, gnu, hart, hartebeest, hind, kaama, moose,
   mule deer, musk deer, okapi, red deer, reindeer, roe, roe deer,
   roebuck, springbok, stag, wildebeest



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ELK
       Extension Language Kit (Scheme)


The Free On-line Dictionary of Computing (30 December 2018):

Extension Language Kit
Elk

    (Elk) A Scheme interpreter by Oliver Laumann
    and Carsten Bormann
    of the Technical University of
   Berlin.  Elk was designed to be used as a general extension
   language.  New types and primitive procedures can easily
   be added.  It has first-class environments, dynamic-wind,
   fluid-let, macros, autoloading and a dump.  It
   provides interfaces to Xlib, Xt and various widget sets;
   dynamic loading of extensions and object files; almost all
   artificial limitations removed; generational/incremental
   garbage collector; Unix system call extensions; Records
   (structures) and bit strings.

   Version: 2.2 is mostly R3RS compatible and runs on Unix,
   Ultrix, VAX, Sun-3, Sun-4, 68000, i386, MIPS, IBM
   PC RT, RS/6000, HP700, SGI, Sony, MS-DOS
   (gcc+DJGPP or go32).

   Germany
   (ftp://ftp.fu-berlin.de/pub/Unix/languages/scheme/elk-2.2.tar.gz).
   US (ftp://ftp.x.org/contrib/elk-2.2.tar.gz).  US
   (ftp://gatekeeper.dec.com/pub/comp.sources.misc/volume8/elk).

   (1994-12-15)


U.S. Gazetteer Counties (2000):

Elk -- U.S. County in Kansas
   Population (2000):    3261
   Housing Units (2000): 1860
   Land area (2000):     647.293474 sq. miles (1676.482330 sq. km)
   Water area (2000):    3.071416 sq. miles (7.954931 sq. km)
   Total area (2000):    650.364890 sq. miles (1684.437261 sq. km)
   Located within:       Kansas (KS), FIPS 20
   Location:             37.425671 N, 96.238982 W
   Headwords:
    Elk
    Elk, KS
    Elk County
    Elk County, KS


U.S. Gazetteer Counties (2000):

Elk -- U.S. County in Pennsylvania
   Population (2000):    35112
   Housing Units (2000): 18115
   Land area (2000):     828.651934 sq. miles (2146.198565 sq. km)
   Water area (2000):    3.578653 sq. miles (9.268669 sq. km)
   Total area (2000):    832.230587 sq. miles (2155.467234 sq. km)
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             41.422346 N, 78.655412 W
   Headwords:
    Elk
    Elk, PA
    Elk County
    Elk County, PA