Standard Lemma guide

protagon

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A supposed crystalline molecule that forms the brain. The idea was proposed by Matthias Eugen Oscar Liebreich and Johann Ludwig Wilhelm Thudichum later disproved it, showing that the brain contains various lipids.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: biochemistry, biology, chemistry, microbiology, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From proto- + Ancient Greek ἀγών (agṓn, “a contest”). See protagonist. So called because it was the first definitely ascertained principle of the brain.