'antibody-containing' is a modern English compound formed from 'antibody' + 'containing'. 'antibody' itself is a coinage from the late 19th century combining the prefix 'anti-' (meaning 'against') with 'body' (meaning 'organism or bodily substance'), and 'containing' derives from the verb 'contain' (from Latin 'continēre').

'antibody' was coined in English in the context of immunology in the late 1800s from 'anti-' + 'body'. 'contain' comes from Latin 'continēre' ('con-' + 'tenēre' meaning 'to hold'), passed into Old French and Middle English before becoming the modern English 'contain' and its present participle 'containing'. The compound 'antibody-containing' is a straightforward modern combination used in medical and scientific contexts.

Initially 'antibody' was introduced to name substances that act against antigens; over time it became the technical term for specific immunoglobulin proteins. 'Contain' originally meant 'to hold together' and evolved into the general sense 'to hold within', which is the sense used in the compound 'antibody-containing'.