ἀκρογωνιαῖος G204
akrogōniaîos · ak-rog-o-nee-ah'-yos · Adjective
from ἄκρον and γωνία; belonging to the extreme corner:--chief corner.
2 Occurrences in the King James Bible
Ephesians 2:20And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone;
1 Peter 2:6Wherefore also it is contained in the scripture, Behold, I lay in Sion a chief corner stone, elect, precious: and he that believeth on him shall not be confounded.