An electrically neutral baryon with isotopic spin 1 WordNet 3.0 & Open English WordNet

The lambda baryons are a family of subatomic hadron particles containing one up quark, one down quark, and a third quark from a higher flavour generation, in a combination where the quantum wave function changes sign upon the flavour of any two quarks being swapped. Wikipedia

Baryon made of specific quark combinations Wikidata

Any of three particles, having no electric charge and an isotopic spin of 1, composed of an up quark, down quark and either a strange quark, a charm quark or a bottom quark. Wiktionary