Glossary entry (derived from question below)
French term or phrase:
la forme propre de
English translation:
the characteristic/distinctive form
French term
la forme propre de
DOC: 1907 Museum catalog of ancient Egyptian mirrors.
CONTEXT: Miroirs solaires. - Le modèle le plus ordinaire, on peut même dire de prédilection, du miroir égyptien est le solaire. Par là il faut entendre cette disposition oblongue qui n'est ni circulaire ni elliptique, mais qu'il n'est pas nécessaire d'être grand observateur, pour reconnaître comme l'aspect sous lequel se présente le soleil au-dessus de la ligne de l'horizon, soit qu'il y rentre, soit qu'il en sorte. Les Égyptiens y avaient à ce point retrouvé ***la forme propre du*** disque solaire que tous les dieux solaires depuis Râ et ses dérivés jusqu'aux divinités que les théologiens solarisèrent pour les faire entrer dans le cadre de l'ennéade héliopolitaine, le portent comme coiffure ou comme principal accessoire de leur coiffure.
ATTEMPT: The Egyptians had captured in this [=oblong configuration] ***a form of the solar disk so accurate*** that all the solar gods, from Ra and his manifestations to the deities whom the theologians solarized in order to bring them into the cadre of the Heliopolitan Ennead, wear it as a headdress or as a principal accessory of their headdress.
ISSUE: I had much help from WordRef, but would like to understand better and be more adept at translating this "propre" in my particular context.
Thanks in advance!
| 3 +2 | the characteristic/distinctive form |
Barbara Cochran, MFA
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| 3 | the perfect form |
Dareth Pray
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Aug 10, 2017 10:13: Rachel Fell changed "Level" from "PRO" to "Non-PRO"
Non-PRO (3): Nikki Scott-Despaigne, writeaway, Rachel Fell
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Proposed translations
United States
Laudable Lady Linguist
Native in: English 
Works in: Spanish to English, French to English, English to Spanish, and 3 more.
the characteristic/distinctive form
United States
High Level Legal Translation
Native in: English (Variant: US) 
Works in: French to English, Italian to English
the perfect form
Second, I don't see "propre" as "accurate" in this case. I think they are using it in the sense of, "the very form of," i.e. the embodiment of this form itself, in other words, the perfect form, the definitive form, etc. Or something like what Barbara suggested.
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