FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

marturion μαρτύριον — mar-too'-ree-on — neuter of a presumed derivative of 3144; something evidential, i.e. (genitive case) evidence given or (specially), the Decalogue (in the sacred Tabernacle):--to be testified, testimony, witness.

see GREEK for 3144