The Collaborative International Dictionary of English v.0.48:

Flicker \Flick"er\, n.
   1. The act of wavering or of fluttering; fluctuation; sudden
      and brief increase of brightness; as, the last flicker of
      the dying flame.
      [1913 Webster]

   2. (Zool.) The golden-winged woodpecker (Colaptes aurutus);
      -- so called from its spring note. Called also
      yellow-hammer, high-holder, pigeon woodpecker, and
      yucca.
      [1913 Webster]

            The cackle of the flicker among the oaks.
                                                  --Thoureau.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Yucca \Yuc"ca\, n. (Zool.)
   See Flicker, n., 2.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Yucca \Yuc"ca\, n. [NL., from Yuca, its name in St. Domingo.]
   (Bot.)
   A genus of American liliaceous, sometimes arborescent, plants
   having long, pointed, and often rigid, leaves at the top of a
   more or less woody stem, and bearing a large panicle of showy
   white blossoms.
   [1913 Webster]

   Note: The species with more rigid leaves (as Yucca
         aloifolia, Yucca Treculiana, and Yucca baccata)
         are called Spanish bayonet, and one with softer
         leaves (Yucca filamentosa) is called bear grass,
         and Adam's needle.
         [1913 Webster]

   Yucca moth (Zool.), a small silvery moth (Pronuba
      yuccasella) whose larvae feed on plants of the genus
      Yucca.
      [1913 Webster]

WordNet (r) 3.0 (2006):

yucca
    n 1: any of several evergreen plants of the genus Yucca having
         usually tall stout stems and a terminal cluster of white
         flowers; warmer regions of North America