subcutaneously

/ˌsʌbkjuˈteɪniəsli/
adverb
  1. Under the skin; in a way that involves or is placed beneath the layers of the skin.
    • The doctor injected the vaccine subcutaneously into the patient's arm.
    • Some medications are absorbed more slowly when given subcutaneously rather than intravenously.
    • The nurse taught him how to administer insulin subcutaneously using a small needle.