marking pin; tailor's pin
A pin used in sewing to temporarily hold fabric or mark positions before stitching.
Before cutting the fabric, I mark it with marking pins.
まち針を一本落としてしまったので、気をつけてください。
I dropped a marking pin, so please be careful.
Standard kanji-kana mixed spelling.
Alternate spelling using the kanji for 'wait'.
Alternate spelling using the kanji for 'wait' and 'needle'.
From 待ち針, literally a “waiting needle”: a pin used to hold pieces of cloth temporarily in place until they are sewn.