Bone - Vine's Expository Dictionary of New Testament Words
Bone[ 1,,G3747, osteon ]
probably from a word signifying strength, or firmness, sometimes denotes hard substances other than bones," e.g., the stone or kernel of fruit. In the NT it always denotes "bones," Matthew 23:27; Luke 24:39; John 19:36; Hebrews 11:22.
Note: As to Ephesians 5:30, RV, "We are members of His body" (in contrast to the AV), "the words that follow in the common text are an unintelligent gloss, in which unsuccessful endeavor is made to give greater distinctness to the Apostle's statement" (Westcott).