第だい一いち関かん節せつ

noun

first knuckle joint

Refers to the joint closest to the fingertip, commonly used in contexts like finger injuries or measuring finger length.

• バスケットボールで第だい一いち関かん節せつを突つき指ゆびした。

  I jammed my first knuckle joint playing basketball.

• 指ゆびの第だい一いち関かん節せつから第だい二に関かん節せつまでの長ながさを測はかる。

  Measure the length from the first knuckle joint to the second knuckle joint of the finger.