radio-

• ⇰ Of or pertaining to, or employing, or operated by, radiant energy, specifically that of electromagnetic waves with frequencies between those of infrared radiation and X-rays; hence, pertaining to, or employed in, broadcast radio or television, microwaves,
• ⇰ of or pertaining to broadcast radio; <as>as, a <ex>radio</ex> program</as>.

• ⇰ A combining form indicating <sig>connection with</sig>, or <sig>relation to</sig>, <sig>a radius</sig> or <sig>ray</sig>; <specif>specifically</specif> <fld>(Anat.)</fld>, <sig>with the radius of the forearm</sig>; <as>as, <ex>radio-</ex>ulnar, <ex>radio-