Commensal
/kəˈmɛn.səl/noun
A person, animal, or organism that lives with, or eats at the same table as, another without harming it.
Did you know?The word comes from Latin roots meaning “with” + “table,” and in biology it was later used for creatures that live off another’s presence without directly harming it—almost like a linguistic spell for hidden dependence.
Etymological Timeline
Latin
Latin
commensālis
“a table companion; one who eats at the same table”
Late Latin
Latin
commensālis
“a companion at table, especially in a shared household or social setting”
Middle French
Old French
commensal
“table companion; fellow diner”
16th Century
English
commensal
“a table companion”
19th Century
English
commensal
“an organism living in close association with another without harming it”
Modern English
English
commensal
“a person, animal, or microorganism that lives with or feeds alongside another without apparent harm”