The Collaborative International Dictionary of English v.0.48:

Romaic \Ro*ma"ic\, a. [NGr. ????: cf. F. roma["i]que. See
   Roman.]
   Of or relating to modern Greece, and especially to its
   language. -- n. The modern Greek language, now usually called
   by the Greeks Hellenic or Neo-Hellenic.
   [1913 Webster]

   Note: The Greeks at the time of the capture of Constantinople
         were proud of being "Romai^oi, or Romans . . . Hence
         the term Romaic was the name given to the popular
         language. . . . The Greek language is now spoken of as
         the Hellenic language. --Encyc. Brit.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hellenic \Hel*len"ic\ (?; 277), a. [Gr. ?, ?, fr. ? the Greeks.]
   Of or pertaining to the Hellenes, or inhabitants of Greece;
   Greek; Grecian. "The Hellenic forces." --Jowett (Thucyd. ).
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hellenic \Hel*len"ic\, n.
   The dialect, formed with slight variations from the Attic,
   which prevailed among Greek writers after the time of
   Alexander.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Hellenic
    adj 1: of or pertaining to or characteristic of the ancient
           Greek and Roman cultures; "classical mythology";
           "classical [syn: classical, classic, Greco-Roman,
           Graeco-Roman, Hellenic]
    2: relating to or characteristic of the classical Greek
       civilization [syn: Hellenic, Hellenistic,
       Hellenistical]
    3: of or relating to or characteristic of Greece or the Greeks
       or the Greek language; "Greek mythology"; "a Grecian robe"
       [syn: Greek, Grecian, Hellenic]
    n 1: the Hellenic branch of the Indo-European family of
         languages [syn: Greek, Hellenic, Hellenic language]