(zoology) Any member of the Didemnidae, tunicates that form colonies on the seabed in shallow waters.

(biochemistry) dideoxynucleotide

A uterine malformation where the uterus is present as a paired organ, as the embryogenetic fusion of the Müllerian ducts failed to occur.

plural of dideoxynucleoside

The nucleoside of a dideoxysugar

(medicine) A uterine malformation where the uterus assumes a paired shape as a consequence of failure of fusion of the Müllerian ducts.

A member of the superfamily Didelphoidea, often used in a more restricted sense to refer to any member of a paraphyletic group of stem marsupialiforms.

plural of didelphimorph

Any opossum of the order Didelphimorphia

(crystallography) Having five planes on each extremity.