Of a boat: designed or modified to allow people to live on board. / Of a person: living on board a boat.

Initialism of β-methylamino-L-alanine: a non-proteinogenic amino acid produced by cyanobacteria.

(dialectal) simple past tense and past participle of ruin

(mineralogy) A mixed oxide mineral containing several different lanthanides as well as titanium, iron and manganese.