| spinifugal | An obsolete term for conducting in a direction away from the spinal cord; denoting the efferent fibres of the spinal nerves. Origin: spine + L. Fugio, to flee (05 Mar 2000) |
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| spinii-spirulate | <zoology> Having spines arranged spirally. See Spicule. Source: Websters Dictionary (01 Mar 1998) |
| spinipetal | An obsolete term for conducting in a direction toward the spinal cord; denoting the afferent fibres of the spinal nerves. Origin: spine + L. Peto, to seek (05 Mar 2000) |