convex polygon
— Noun
– English
～ a polygon such that no side extended cuts any other side or vertex; it can be cut by a straight line in at most two points
concave polygon
— Noun
– English
～ a polygon such that there is a straight line that cuts it in four or more points
convex polyhedron
— Noun
– English
～ a polyhedron any plane section of which is a convex polygon
concave polyhedron
— Noun
– English
～ a polyhedron some of whose plane sections are concave polygons
class Polyplacophora
— Noun
– English
～ small class of marine mollusks comprising the chitons; sometimes considered an order of the subclass Amphineura
common polypody
— Noun
– English
～ mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asia
coast polypody
— Noun
– English
～ stiff leathery-leaved fern of western North America having ovate fronds parted to the midrib
Carpocapsa pomonella
— Noun
– English
～ a small grey moth whose larvae live in apples and English walnuts
California pompano
— Noun
– English
～ smaller than Florida pompano; common in West Indies
Carolina pond fern
— Noun
– English
～ small free-floating aquatic fern from the eastern United States to tropical America; naturalized in western and southern Europe
Canadian pondweed
— Noun
– English
～ North American waterweed; widely naturalized in Europe
curly pondweed
— Noun
– English
～ European herb naturalized in the eastern United States and California
curled leaf pondweed
— Noun
– English
～ European herb naturalized in the eastern United States and California