Where does “equivalentist” come from?

equivalentist (English) comes from English equivalent, from English -valent, from English Valence, from French Valence, from Latin Valentia, from Latin -ia, from Latin -ius, from Proto-Italic -jōs — Creates adjectives from noun or verb stems.

equivalentist (English): Any of a group of people who proposed a system of atomic weights based on combining equivalents

Definitions

  1. Any of a group of people who proposed a system of atomic weights based on combining equivalents

Ancestry of “equivalentist”, step by step

equivalentist traces back through two separate lines of ancestry.

via English equivalent

StepLanguageWordMeaning
1EnglishequivalentSimilar or identical in value, meaning or effect;...
2English-valentHaving one or more valences
3EnglishValenceThe number of arguments that a verb can have, including its subject, ranging from zero to three or, less commonly, four
4FrenchValencevalence
5LatinValentiahealth, vigour, bodily strength
6Latin-iaUsed to form a feminine abstract noun, usually...
7Latin-iusforming adjectives from nouns; nominative neuter...
8Proto-Italic-jōsForms comparative adjectives
9Proto-Indo-European-yósCreates adjectives from noun or verb stems

via English ist

StepLanguageWordMeaning
1EnglishistA practitioner or supporter of an ism
2English-istAdded to words to form nouns denoting
3Old French-iste
4Latin-ista-ist; one who practises or believes
5Ancient Greek-ιστήςAlternative form of -τής; -ist
6Ancient Greek-τήςAppended to verbs to form agent nouns
7Proto-Hellenic-tās
Every word from Proto-Indo-European -yósEvery word from Latin -iaEvery word from Latin -ius