protactinium

Fetched 2026-10-26 (cache).

Synonyms: protoactinium

Antonyms: protoactinium

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{senseid|en|Q1109}}{{lb|en|chemistry}} A chemical element (symbol {{l|mul|Pa}}) with [[atomic number]] 91. A dense, silvery-gray [[actinide]] [[metal]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.