A congenital disorder in which a part of the spinal cord is split, usually at the level of the upper lumbar vertebra.

plural of diasterane

(organic chemistry) Any of a group of isomers of steranes formed during diagenesis

(organic chemistry) The simplest possible asterane tricyclo[3.1.1.12,4]octane, or [2]asterane

plural of diastereoselection

(chemistry) The chemistry of diastereomers

(medicine) An abnormal gap between the abdominal muscles, sometimes caused by pregnancy or occurring in newborn children.

In a diastatic sense.

Relating to diastereochemistry.

(biology, of a bird) The state of not having a fifth secondary feather