na-adjective
Describes something that is not central or important; often used for details, problems, or roles that are secondary or insignificant.
その問題は末梢的なので、後で話し合いましょう。
That issue is trivial, so let's discuss it later.
彼は会議で末梢的なことばかり指摘した。
He only pointed out minor things at the meeting.
Antonym: 重要 means 'important' or 'significant', the opposite of 末梢的.
From 末梢 (まっしょう, 'tip of a branch; peripheral details') + 的 (てき, '-like, -ic'). The compound 末梢 originally referred to the tips of tree branches, metaphorically extended to mean peripheral or non-essential matters.