John Woldemar Cowan, The Complete Lojban Language — Chapter 2 - The concept of the bridi (1997)
“ See Chapter 6. selbri: logical predicate; the core of a bridi; the word or words specifying the relationship between the objects referred to by the sumti. See Chapter 5. cmavo: one of the Lojban parts of speech; a short word; a structural word; a word used for its grammatical function. brivla: one of the Lojban parts of speech; a content word; a predicate word; can function as a selbri; is a gismu, a lujvo, or a fu'ivla. See Chapter 4. gismu: a root word; a kind of brivla; has associated rafsi. See Chapter 4. lujvo: a compound word; a kind of brivla; may or may not appear in a dictionary ”
