(pathology) A gap or space between two adjacent teeth, especially the upper front incisors (in humans). / (pathology) any abnormal space, fissure, or cleft in an organ or part of the body.

(chemistry) A stereoisomer having multiple chiral centres; a diastereoisomer cannot normally be superimposed on the mirror image of another.

(chiefly uncountable, physiology) The phase or process of relaxation and dilation of the heart chambers, between contractions, during which they fill with blood; an instance of the process.

(medicine) A separation between two parts, such as separation of a bone, without fracture. / The property of being diastatic, i.e. having germinated.

(biochemistry) Any one of a group of enzymes which catalyse the breakdown of starch into maltose; mostly amylases (α-amylase and β-amylase).

plural of diastase

plural of diastereoisomer

plural of diastereoselectivity

(organic chemistry) The preferential formation of one diastereoisomer over another; also, the degree of said preference

diastereoisomerization