The Collaborative International Dictionary of English v.0.48:

Encomiastic \En*co`mi*as"tic\, Encomiastical
\En*co`mi*as"tic*al\, a. [Gr. ?.]
   Bestowing praise; praising; eulogistic; laudatory; as, an
   encomiastic address or discourse. -- En*co`mi*as"tic*al*ly,
   adv.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Encomiastic \En*co`mi*as"tic\, n.
   A panegyric. --B. Jonson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

encomiastic
    adj 1: formally expressing praise [syn: encomiastic,
           eulogistic, panegyric, panegyrical]