noun a type of small protein that is important in cell signaling, especially in the immune system
noun Human T-cell lymphotropic virus type 1 (HTLV-1) is a retrovirus that infects T-cells and can lead to various diseases.
adjective HTLV-1 is used as an adjective to describe the specific type of virus.
noun a combining form meaning gland, glandular, as in adenovirus