Wing section

...The aerodynamic design of these wings integrated with the fuselage is called a blended wing-body, and generally the boundary between the wing and the fuselage is smooth. [Kuse Shinji]
[Names of each wing part]
The shape of a wing when viewed from directly above is called the wing planform, and the cross-sectional shape in the fore-aft direction is called the airfoil or wing section. When examining wings aerodynamically, the airfoil alone is called a two-dimensional wing, and the combination of the airfoil and planform is called a three-dimensional wing. …

*Some of the terminology that mentions "wing section" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…なお，これらの翼を胴体とまとめて一体として空力設計したものは翼胴一体化blended wing‐bodyと呼ばれ，一般に翼と胴体との境目がなだらかになる。【久世 紳二】
【翼各部の名称】
翼を真上から見たときの形状を翼の平面形wing planform，前後方向の断面形を翼型airfoilまたは翼断面wing sectionという。翼を空力的に調べる場合，翼型だけを二次元翼，翼型と平面形の組合せを三次元翼としている。…

※「wing section」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報