also: ドータカード
daughter card; daughterboard
A secondary circuit board that attaches to a motherboard or main board to add functions. Technical computing term.
This motherboard has a slot where you can add a daughter card.
Shortened variant without the long vowel mark; less common but still used.
Spelling with a middle dot; sometimes seen in technical writing but not typical.
Shortened variant with a middle dot; rare.
Borrowed from English 'daughter card', a term used in computing for a secondary circuit board.