pyrgoïdal
See also: pyrgoidal
French edit
Etymology edit
From Ancient Greek πύργος (púrgos, “tower”) + -oïde + -al.
Adjective edit
pyrgoïdal (feminine pyrgoïdale, masculine plural pyrgoïdaux, feminine plural pyrgoïdales)
- (obsolete) In mathematics, qualifies a number that is composed of a columnar number and a pyramidal one, such that the side of the first is larger than that of the second by one