grenz ray

noun

An ultrasoft X-ray used in treating various skin diseases.

OriginGerman Grenz →
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Meanings

noungrenz ray (plural grenz rays)

plural grenz rays

  1. An ultrasoft X-ray used in treating various skin diseases.

Origin

  1. GermanGrenz“border”
  2. Englishgrenz ray

From German Grenz (“border”) (since the effects were thought to be on the border between ultraviolet light and traditional X-rays) + ray.

More words from German

Full word history & related roots →
Cite this entry
APA

grenz ray. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/grenz%20ray

MLA

“grenz ray.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/grenz%20ray. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “grenz ray,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/grenz%20ray.

Source: grenz ray on Wiktionary, CC BY-SA 4.0.