- Immunology. any of various cells of the immune system that work with T or B cells to initiate a specific immune response.
- Also called subsidiary cell. Botany. a plant epidermal cell associated with guard cells and different morphologically from other epidermal cells.
Origin of accessory cell
First recorded in 1830–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- See subsidiary cell.
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