Aviation Dictionary
بالهای مخروطی ،بال هایی که هم در عرض و هم در ضخامت از طرف بدنه به نوک تدریجا" باریک میشوند
A wing tapered in both planform and thickness. The planform of a wing is its shape as seen from above, looking down on it, and thickness is the shape as seen from the front, looking aft.