obscure rays
noun
Dark or invisible rays; specifically heat-rays of the solar spectrum. Now rare.
Origin
Mid 19th century; earliest use found in Mary Somerville (1780–1872), science writer and mathematics expositor.
- non-secretor
- non-sectarian
- non-secular
- non-segmental
- non-segmented
- non-segregated
- non-selective
- non-selectively
- non-self
- non-sensational
- nonsense
- nonsense book
- nonsense mutation
- nonsense poetry
- nonsense syllable
- nonsense verse
- nonsense word
- nonsensible
- nonsensical
- nonsensicality
- nonsensically
- remake
- reman
- remanant
- remanation