s, a, o, d, e, l, n, p, r, i, v, y are letters that make 'Pennsylvanian period'
ER, Pennsylvania, Penn, van, lv, OD, AN, pe, period, pen, VA, en, RI, sylvan, ani, Rio, IA, Io, sylva, peri, Pennsylvanian, Er, Ni are words within 'Pennsylvanian period'
1 possible definitions for 'Pennsylvanian period'
Under this definition, pennsylvanian period is a noun and has the following properties:
Pennsylvanian, Upper Carboniferous, Upper Carboniferous period have the same meaning as 'Pennsylvanian period'
'Pennsylvanian period' can be considered an instance of period, geological period.
'Pennsylvanian period' can be a part of Carboniferous, Carboniferous period.