noun
1.
a. or scaly-bark hickory : shagbark hickory
b. : any of several rough-barked Australian eucalypts ; especially : a rather small tree ( Eucalyptus squamiata ) with dark scaly bark, lanceolate leaves, and coarse reddish wood used chiefly for fuel
2. : either of two abnormal conditions characterized by roughened scaly bark:
a. : leprosis
b. : psorosis