Quotation from: Manual of Surgery

Written by: Alexander Miles and Alexis Thomson

#Healing by Primary Union.#--The most favourable conditions for the
progress of the reparative process are to be found in a clean-cut wound
of the integument, which is uncomplicated by loss of tissue, by the
presence of foreign substances, or by infection with disease-producing
micro-organisms, and its edges are in contact. Such a wound in virtue of
the absence of infection is said to be _aseptic_, and under these
conditions healing takes place by what is called "primary union"--the
"healing by first intention" of the older writers.