What does trivalent mean?
Trivalent is a formal scientific and medical adjective meaning “having three” in a specific technical sense. In chemistry, it describes an atom, ion, group, or compound with a valency of three, meaning that it can combine with three monovalent atoms or groups. In immunology and medicine, it commonly describes a vaccine that targets three distinct strains of a pathogen. The word is precise rather than colloquial and is especially associated with chemistry, molecular biology, and vaccines. Its usefulness lies in making the number three explicit in contexts where “tri-” might otherwise be ambiguous. A trivalent vaccine is not necessarily administered in three doses; the term refers to the three strains it is intended to address. In general writing, trivalent is normally best reserved for these specialized uses.
adjectiveHaving a valency of three, or capable of combining with three monovalent atoms or groups. In medicine and immunology, involving or containing three distinct strains or components.
- Having a valency of three in chemistry.
- Involving or containing three distinct strains or components, especially in immunology and medicine.
"The trivalent vaccine provides protection against three strains of influenza."
"The trivalent vaccine is designed to protect against three circulating influenza strains."
"Trivalent nitrogen can form compounds with three separate bonding partners."
A trivalent vaccine does not necessarily mean three doses; it means protection against three targeted strains.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
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How trivalent is actually used
The word is primarily used in technical scientific and medical contexts. In chemistry, it describes valency; in immunology, it commonly describes a vaccine or other preparation containing three strains or components.