Of or pertaining to a river delta / Shaped like an equiangular triangle / Shaped like an equilateral triangle / Shaped like a triangle

The formation of a delta or deltas.

plural of deltafication

Relating to deltaproteobacteria.

Any virus of the genus Deltaretrovirus.

plural of deltaretrovirus

In the form of a deltahedron.

plural of deltahedron

(geometry) A polyhedron whose faces are all equilateral triangles.

Any baculovirus of the genus Deltabaculovirus