Pahoehoe n. : A name given in the Sandwich Islands to lava having a relatively smooth surface, in distinction from the rough-surfaced lava, called a-a.

Example:
How are aa and Pahoehoe different?

Taxonomy
lava, lava flow, eruption, Pāhoehoe, viscosity, lava dome, volcano, Lava tubes, Pillow lava, temperatures, basalt, viscous, fragments, volcanoes, crust, rock, magma, molten rock.

Defination from the web:
pahoehoe in Wiktionary, the free dictionary. Lava is molten rock expelled by a volcano during eruption. ... Most basalt lavas are of a'a or "pahoehoe" types, rather than block lavas. ... Pahoehoe lavas typically have a temperature of 1100 to 1200 °C. ...