noun
step stool; stool for reaching high places
A small stool or platform used to stand on when reaching high shelves or objects.
高い棚の物を取るために継ぎ台を使った。
I used a step stool to get something from the high shelf.
noun
In horticulture, the rooted part of a plant onto which a scion is grafted.
このバラは強い継ぎ台に接いであります。
This rose is grafted onto a strong stock.
Compound of 継ぎ (tsugi, 'joining' or 'splicing') and 台 (dai, 'stand' or 'platform'). The first sense refers to a platform used to extend one's reach, while the second sense is a specialized horticultural term for the base plant in grafting.