umbral

About 0.03 uses per million words.

Meaning

1. adjective Of or relating to an umbra.
2. adjective Of or relating to umbral calculus.

Similar words

penumbral umbratic umbrielian umbonial umbonic umbracular umbonal adumbrative umbilical uveal

Often followed by

shadow de del dots cone area and spectrum oscillations model

Word family

umbra umbrae umbras