From pro- + head.
prohead (plural proheads)
- A procapsid.
2015 December 4, “DNA Packaging Specificity of Bacteriophage N15 with an Excursion into the Genetics of a Cohesive End Mismatch”, in PLOS ONE[1], →DOI:The concatemers are processed into mature chromosomes with cohesive ends, and packaged into prohead shells, during virion assembly.