Subspace tensor matrix

From Memory Alpha, the free Star Trek reference

A subspace tensor matrix is a construct which can be used to create artificial lifeforms.

Doctor Lenara Kahn devised a technique for creating artificial wormholes which involved generating a subspace tensor matrix in the 25,000-30,000 cochrane range, and then sending out a magneton pulse using a target drone. (DS9: "Rejoined")