parachordal

1 of 2

adjective

para·​chord·​al -ˈkȯrd-ᵊl 

: situated at the side of the notochord

parachordal

2 of 2

noun

: either of a pair of cartilaginous rods that develop on each side of the notochord beneath the posterior part of the embryonic brain and participate in formation of the parachordal plate