Translation guide
The English word "spherical" describes something shaped like a sphere or relating to spheres. In Japanese, the most common equivalent is 球形の (きゅうけいの), but other terms are used depending on context, such as mathematics, everyday description, or technical fields.
Describing an object that has the form of a perfect ball or globe.
The most direct and common translation for 'spherical'. Used for objects that are round like a ball.
This lamp has a spherical design.
Similar to 球形の, but slightly more formal or technical. Often used in scientific contexts.
The cell has a spherical shape.
Means 'round' or 'circular'. Can be used for spherical objects in casual contexts, but is less precise than 球形の.
丸い can also mean 'circular' (2D), so context is needed to clarify 3D roundness.
The Earth is round/spherical.
Refers to a 'spherical body' or 'sphere'. Used in geometry or when emphasizing the solid shape.
This sculpture has a perfectly spherical form.
Used in mathematical or scientific contexts to describe properties of spheres.
球形 (きゅうけい) is the most general term for 'spherical shape'. 球状 (きゅうじょう) is slightly more formal and often used in scientific descriptions. 丸い (まるい) is casual and can mean 'round' in both 2D and 3D, so it's less precise.
Using spherical coordinates simplifies the calculation.