Sherd in the context of "Grenade"

An ostracon (Greek: ὄστρακον ostrakon, plural ὄστρακα ostraka) is a piece of pottery, usually broken off from a vase or other earthenware vessel. In an archaeological or epigraphical context, ostraca refer to sherds or even small pieces of stone that have writing scratched into them. Usually these are considered to have been broken off before the writing was added; ancient people used the cheap, plentiful, and durable broken pieces of pottery around them as a convenient medium to write on for a wide variety of purposes, mostly very short inscriptions, but in some cases very long.

A grenade is a small explosive weapon typically thrown by hand (also called hand grenade), but can also refer to a shell (explosive projectile) shot from the muzzle of a rifle (as a rifle grenade) or a grenade launcher. A modern hand grenade generally consists of an explosive charge ("filler"), a detonator mechanism, an internal striker to trigger the detonator, an arming safety secured by a transport safety. The user removes the transport safety before throwing, and once the grenade leaves the hand the arming safety gets released, allowing the striker to trigger a primer that ignites a fuze (sometimes called the delay element), which burns down to the detonator and explodes the main charge.

Grenades work by dispersing fragments (fragmentation grenades), shockwaves (high-explosive and stun grenades), chemical aerosols (smoke, gas and chemical grenades), fire (incendiary grenades) or a jet of molten metal (anti-tank grenades). Their outer casings, generally made of a hard synthetic material or steel, are designed to rupture and fragment on detonation, sending out numerous fragments (shards and splinters) as fast-flying projectiles. In modern grenades, a pre-formed fragmentation matrix inside the grenade is commonly used, which may be spherical, cuboid, wire or notched wire. Most anti-personnel (AP) grenades are designed to detonate either after a time delay or on impact.

The history of Qatar spans from its first duration of human occupation to its formation as a modern state. Human occupation of Qatar dates back 50,000 years, and Stone Age encampments and tools have been unearthed in the Arabian Peninsula. Mesopotamia was the first civilization to have a presence in the area during the Neolithic period, evidenced by the discovery of potsherds originating from the Ubaid period near coastal encampments.

The peninsula fell under the domain of several different empires during its early years of settlement, including the Seleucid, the Parthians and the Sasanians. In 628 AD, the population was introduced to Islam after Muhammad sent an envoy to Munzir ibn Sawa who was the Sasanid governor of Eastern Arabia. It became a pearl trading center by the 8th century. The Abbasid era saw the rise of several settlements. After the Bani Utbah and other Arab tribes conquered Bahrain in 1783, the Al Khalifa imposed their authority over Bahrain and mainland Qatar. Over the following centuries, Qatar was a site of contention between the Wahhabi of Najd and the Al Khalifa. The Ottomans expanded their empire into Eastern Arabia in 1871, withdrawing from the area in 1915 after the beginning of World War I.

In archaeology, morphology is the study of the shape of artefacts and ecofacts.

Morphology is a major consideration in grouping artefacts into period styles and, despite modern techniques like radiocarbon dating, remains a crucial tool in the identification and dating not only of works of art but all classes of archaeological artefact, including purely functional ones (ignoring the question of whether purely functional artefacts exist). The term morphology ("study of shapes", from the Greek) is more often used for this. Morphological analyses of many individual artefacts are used to construct typologies for different types of artefact, and by the technique of seriation a relative dating based on shape and style for a site or group of sites is achieved where scientific absolute dating techniques cannot be used, in particular where only stone, ceramic or metal artefacts or remains are available, which is often the case. That artefacts such as pottery very often survive only in fragments makes precise knowledge of morphology even more necessary, as it is often necessary to identify and date a piece of pottery from only a few sherds.

Execration texts, also referred to as proscription lists, are ancient Egyptian hieratic texts, listing enemies of the pharaoh, most often enemies of the Egyptian state or troublesome foreign neighbors. The texts were most often written upon statuettes of bound foreigners, bowls, or blocks of clay or stone, which were subsequently destroyed. The ceremonial process of breaking the names and burying them was intended to be a sort of sympathetic magic that would affect the persons or entities named in the texts. The fragments were usually placed near tombs or ritual sites. This practice was most common during times of conflict with the Asiatic neighbors of Egypt.

Tamil-Brahmi, also known as Tamili or Damili, was a variant of the Brahmi script in southern India. It was used to write inscriptions in Old Tamil. The Tamil-Brahmi script has been paleographically and stratigraphically dated between the third century BCE and the first century CE, and it constitutes the earliest known writing system evidenced in many parts of Tamil Nadu, Kerala, Karnataka, Andhra Pradesh and Sri Lanka. Tamil Brahmi inscriptions have been found on cave entrances, stone beds, potsherds, jar burials, coins, seals, and rings.

Tamil Brahmi resembles but differs in several minor ways from the Brahmi inscriptions found elsewhere on the Indian subcontinent such as the Edicts of Ashoka found in Andhra Pradesh. It adds diacritics to several letters for sounds not found in Prakrit, producing ṉ ṟ ṛ ḷ. Secondly, in many of the inscriptions the inherent vowel has been discarded: A consonant written without diacritics represents the consonant alone, whereas the Ashokan diacritic for long ā is used for both ā and short a in Tamil-Brahmi. This is unique to Tamil-Brahmi and Bhattiprolu among the early Indian scripts. Tamil-Brahmi does not, however, share the odd forms of letters such as gh in Bhattiprolu. This appears to be an adaptation to Dravidian phonotactics, where words commonly end in consonants, as opposed to Prakrit, where this never occurs. According to Mahadevan, in the earliest stages of the script the inherent vowel was either abandoned, as above, or the bare consonant was ambiguous as to whether it implied a short a or not. Later stages of Tamil Brahmi returned to the inherent vowel that was the norm in ancient India.