Spina Bifida :: Spin (n.) Velocity of rotation about some specified axis.
Spinaceous :: Spina bifida () A congenital malformation in which the spinal column is cleft at its lower portion, and the membranes of the spinal cord project as an elastic swelling from the gap thus formed..
Spinach :: Spinaceous (a.) Of, pertaining to, or resembling, the plant spinach, or the family of plants to which it belongs..