needle-freeadj.
/ˈniːdlfriː/, U.S. /ˈnid(ə)lˈfri/ Lacking needles, needleless, not involving needles; esp. (in relation to the administration of drugs) functioning or effected without a needle or needles.
ΚΠ
1969 Current Therapeutic Res. 11 763 By using the needle-free injector, the treatment was rapid.
1987 M. Kochanski Northern Bushcraft (1988) vi. 175 Dry, dead, needle-free boughs make a more insulative, but less resilient bed than one made of green boughs.
1989 Omni Aug. 8/2 The University of Minnesota Pediatric Oncology Clinic has used our injectors for the needle-free administration of anesthetics to hundreds of children undergoing marrow aspirations.
1996 Health Industry Today (Nexis) Mar. 1 Medi-Ject will develop and produce a pen-sized, reuseable, needle-free injector.
1999 Jrnl. Pediatric Surg. 34 946 The authors..studied the efficacy of iontophoresis, a needle-free technique in which positively charged lidocaine and epinephrine molecules are drawn into the tissue by an electrical current.
This is a new entry (OED Third Edition, September 2003; most recently modified version published online March 2022).
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adj.1969