Wikipedia
Linear A is one of two currently undeciphered writing systems used in ancient Greece ( Cretan hieroglyphic is the other). Linear A was the primary script used in palace and religious writings of the Minoan civilization. It was discovered by archaeologist Sir Arthur Evans. It is the origin of the Linear B script, which was later used by the Mycenaean civilization.
In the 1950s, Linear B was largely deciphered and found to encode an early form of Greek. Although the two systems share many symbols, this did not lead to a subsequent decipherment of Linear A. Using the values associated with Linear B in Linear A mainly produces unintelligible words. If it uses the same or similar syllabic values as Linear B, then its underlying language appears unrelated to any known language. This has been dubbed the Minoan language.
Linear A is a Unicode block containing the characters of the ancient, undeciphered Linear A.
Usage examples of "linear a".
She had been picking up on the Minoan Linear A, evidently having a ready mind for interpretation.
Instead of being etched by hand, as were all texts of Crete's later Linear A and Linear B scripts, the disk's signs were punched into soft clay (subsequently baked hard) by stamps that bore a sign as raised type.
She could envision the linguist swathed in robes, pretending to be a woman and hiding a recorder so that he could gather precious words to add to the little known about the language still termed Linear A.
Further obscuring this lost culture was the fact that the only surviving documents were written in two as-yet indecipherable script forms, known as Linear A and Linear B.