Pollaxe Pollaxe The pollaxe is a type of European polearm. It was widely used by medieval infantry. It is also known by the names poleaxe, pole-axe, pole axe, polax, and Hache (French meaning axe). The term has become synonymous with felling or striking down with delivery of a blow. Weapons such as the halberd, bardiche, and Danish axe are sometimes mistakenly called pollaxes as they are indeed axes mounted on poles, but many etymological authorities consider the "poll"- prefix historically unrelated to "pole", instead meaning "head". However, some etymologists, including Eric Partridge, believe that the word is derived from "pole". The
Types of volcanic eruptions Types of volcanic eruptions Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed. Some volcanoes may exhibit only one characteristic type of eruption during a period of activity, while others may display an entire sequence of types all in one eruptive series. There are three different types of eruptions. The most well-observed are magmatic eruptions, which involve the decompression of gas within magma that