Source : Webster's Revised Unabridged Dictionary (1913)

Ceterach \Cet"e*rach\, n. [F. c['e]t['e]rac, fr. Ar. shetrak.]
   (Bot.)
   A species of fern with fronds ({Asplenium Ceterach}).

Source : WordNet®

Ceterach
     n : small genus of Old World ferns; superseded in some
         classification systems which place plants of this genus
         in e.g. genera Asplenium and Pleurosorus [syn: {genus
         Ceterach}]