'Apostles' in the Bible

for I think that God did set forth us the apostles last -- as appointed to death, because a spectacle we became to the world, and messengers, and men;

have we not authority a sister -- a wife -- to lead about, as also the other apostles, and the brethren of the Lord, and Cephas?

And some, indeed, did God set in the assembly, first apostles, secondly prophets, thirdly teachers, afterwards powers, afterwards gifts of healings, helpings, governings, divers kinds of tongues;

are all apostles? are all prophets? are all teachers? are all powers?

afterwards he appeared to James, then to all the apostles.

for I am the least of the apostles, who am not worthy to be called an apostle, because I did persecute the assembly of God,