1778, from em- + bed (n.). Originally a geological term, in reference to fossils in rock; figurative sense is from 1835; meaning "place a journalist within a military unit at war" is 2003. Related: Embedded; embedding.
1. One instance of some mathematical object contained with in another instance, e.g. a group which is a subgroup. 2. (domain theory) A complete partial order F in [X -> Y] is an embedding if (1) For all x1, x2 in X, x1 F x1 (2) For all y in Y, x | F x is directed. ("LaTeX as \sqsubseteq). (1995-03-27)