Providing necessary support to the primary activities or operation of an organization or system. Secondary but important; serving as an aid or supplement.
From Latin ancillaris meaning 'of a maidservant,' from ancilla meaning 'female servant.' The modern meaning evolved from the concept of providing helpful service or support.
Despite its origins referring to servants, 'ancillary' has evolved into a respectful term highlighting the importance of supporting roles. In medicine, ancillary services like laboratory work and radiology are essential to patient care, even though they're not the primary treatment.
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