A thymocyte that has the phenotype CD4-negative, CD8-positive, CD44-negative, CD25-negative, and pre-TCR-positive. [ http://www.immgen.org/index_content.html https://www.worldcat.org/search?q=bn%3A0781735149 GOC:tfm GOC:add http://purl.obolibrary.org/obo/go/references/0000031 ]

Synonyms: immature single positive T lymphocyte ISP immature single positive T-lymphocyte immature single positive T cell T.ISP.th