noun-modifying (irregular)
Describes glasses without a frame around the lenses.
彼はフチなしの眼鏡をかけている。
He wears rimless glasses.
noun-modifying (irregular)
Used for printing without margins, such as borderless photos or documents.
このプリンターはフチなし印刷に対応している。
This printer supports borderless printing.
フレームレス is a loanword from English 'frameless' and is used more broadly for frameless designs (e.g., monitors, doors), while フチなし specifically emphasizes the absence of a rim or border.
Compound of フチ (rim, edge) + なし (without). The word is a straightforward native Japanese formation.