'angulose' originates from Latin, specifically the word 'angulōsus,' where 'angul(us)' meant 'angle' and the suffix '-ōsus' meant 'full of.' English formed 'angulose' on this Latin model with the suffix '-ose' from Latin '-ōsus' meaning 'full of.'

'angulōsus' in Late/Neo-Latin influenced scientific descriptions and, alongside French 'anguleux' and English morphological patterns, yielded the Early Modern English adjective 'angulose.'

Initially, it meant 'full of angles,' and this core sense has remained, with later specialized use in technical fields like botany and zoology to denote angled structures.