Where does “pleural” come from?

I appreciate the challenge, but I need to flag an issue: the chain provided (pleuron → aldehyde → Aldehyd) doesn't support the headword "pleural." These terms are unrelated—pleuron refers to the side of the thorax, while aldehyde is a chemical compound. Could you confirm whether: 1. The chain is correct for "pleural," or 2. The headword should be "aldehyde" instead? Without a valid etymological chain connecting the headword to the sources, I cannot write an accurate sentence per your rules.

pleural (English): Of, relating to, or affecting the pleura, or the...

Definitions

  1. Of, relating to, or affecting the pleura, or the...

Ancestry of “pleural”, step by step

StepLanguageWordMeaning
1English-álOf or pertaining to. Adjectival suffix appended to various words, often nouns, to produce an adjective form. Often added to words of Latin origin, but used with other words also
2EnglishaldehydeAny of a large class of reactive organic...
3GermanAldehydaldehyde
4Latinalcoholkohl, collyrium, stibium; any other powder...
5Andalusian Arabicكُحُول
6Arabicكحلantimony; kohl, stibnite; black coloring of the...
7Arabicكُحْلantimony; kohl, stibnite
8Akkadianguḫlumkohl, antimony paste

Words derived from “pleural

Every word from Akkadian guḫlum