sunspottedness

uncountable

The quality or degree of having sunspots.

Japanese Meaning

太陽に黒点が存在する状態、またはその程度

Astronomers measured the sunspottedness of the star to determine its magnetic activity.

天文学者たちは、その星の黒点の程度を測定して、磁気活動を調べた。

Sense（1）

The quality or degree of having sunspots.

The Earth's magnetic activity does not cease during years of minimum or of almost no sunspottedness.