楕
ellipse
Readings
On'yomi
- ダ
- タ
Kun'yomi
—
Meaning
楕 centers on the geometric shape of an ellipse: a flattened circle or oval.
Most common words using 楕
- 楕円だえんN2
ellipse; oval
- 楕円形だえんけいN1
elliptical shape; oval shape
- スーパー楕円スーパーだえん
superellipse
- 回転楕円体かいてんだえんたい
spheroid
- 楕円体だえんたい
ellipsoid body
- 楕円幾何学だえんきかがく
elliptic geometry; Riemannian geometry
- 楕円曲線だえんきょくせん
elliptic curve
- 楕円軌道だえんきどう
elliptical orbit
- 楕円銀河だえんぎんが
elliptical galaxy
- 楕円関数だえんかんすう
elliptic function
- 楕円面だえんめん
ellipsoid
- 超楕円関数ちょうだえんかんすう
hyperelliptic function
Study
Etymology
楕 is a phono-semantic compound: 木 (tree, wood) suggests a material or shape, and the right side (a simplified form related to 隋) likely contributes the sound ダ. The exact historical development of the right-side component is uncertain.
Meaning mnemonic
Picture a wooden (木) frame shaped into an ellipse. The right side looks like a squashed oval with a line through it, reinforcing the elliptical shape.
Reading mnemonic
For ダ, imagine drawing an ellipse in the dark: dark -> ダ, and the wooden frame helps you trace the oval shape.