Question: In Tetrabiblos, what does Hyleg mean?

full_context: Document 1: Parajata yoga: Parajāta yogas (Sanskrit: परजात – meaning stranger or servant or born of another) are special planetary combinations or yogas that indicate birth of children who are not genetically related to their father or non-marital children or born out of illicit connections of their married mothers. Illegitimate children are stigmatized for no fault of theirs; some, like T.E.Lawrence, are made to seek redemption of their mother’s status but most accept their fate like Satyakama Jabala did. In India, illegitimate children of a Hindu father do not inherit from him on intestacy but they do inherit from their mother at par with her legitimate children.
Document 2: Astronomica (Manilius): The Astronomica (] or ]), also known as the Astronomicon, is a Latin didactic poem written in hexameters and divided into five books about celestial phenomena. The "Astronomica" was penned c. AD 10– 20 by a Roman poet whose name was likely Marcus Manilius; little is known of Manilius, and although there is evidence that the "Astronomica" was read by many other Roman writers, no surviving works quote him. The poem was rediscovered c. 1416– 1417 by the Italian humanist and scholar Poggio Bracciolini, who had a copy made from which the modern text derives.
Document 3: Sun sign astrology: Sun sign astrology is the form of astrology most commonly found in many newspaper and magazine columns. It is a simplified system of astrology which considers only the position of the Sun at birth, which is said to be placed within one of the twelve zodiac signs. This sign is then called the "sun sign" or "star sign" of the person born in that twelfth-part of the year.
Document 4: Shani: Shani (Sanskrit: शनि , Śani ) refers to planet Saturn, and is one of the 9 heavenly objects known as Navagraha in Hindu astrology. Shani is also a male deity in the Puranas, whose iconography consists of a handsome dark (black) figure carrying a sword (or another weapon) and sitting on a buffalo (or crow or vulture).
Document 5: Power sign (astrology): In astrology, power signs are associated with extreme power, authority, energy (positive or negative) and a need to control the surroundings. These signs are determined, willful and are more prone to gain power. On the other hand, they can be dictatorial and headstrong.
Document 6: Haly Abenragel: Abū l-Ḥasan 'Alī ibn Abī l-Rijāl (Arabic: أبو الحسن علي ابن أبي الرجال‎ ‎ ) (commonly known as "Haly", "Hali", "Albohazen Haly filii Abenragel" or "Haly Abenragel", from "ibn Rijal") was an Arab astrologer of the late 10th and early 11th century, best known for his "Kitāb al-bāri' fī aḥkām an-nujūm". He was a court astrologer to the Tunisian prince al-Mu'izz ibn Bâdis in the first half of the 11th century. Haly died after 1037 in Kairouan in what is now Tunisia.
Document 7: Adhi yoga: Parashara states that at the time of birth benefic planets viz - Mercury, Jupiter and Venus, situated in the 6th, the 7th and the 8th house from the Natal Moon give rise to Adhi yoga (provided the planets giving rise to this yoga are neither aspected by or joined by malefic planets) and the person will be a king or a minister or a commander of forces (also interpreted as a leader) in accordance with the strength gained by these named planets; he does not mention the order of their placement. This yoga has also been cited by Varahamihira as arising from the Moon alone. B. Suryanarain Rao, concurring with others states that this definition of Adhi yoga indicates that all benefics must be in these houses or in any one of these houses i.e. in 6th, 7th and 8th, or in 6th or in 7th or in 8th, or in 6th and 7th or 6th and 8th or in 7th and 8th. He also cites the opinion of Srutakriti who states that malefic planets occupying these bhavas will also give rise to Adhi yoga but the person will be evil minded and tyrannical; if benefics and malefic are thus placed then mixed results will ensue. Mandavya and Saravali class Adhi yoga as Raja yoga.
Document 8: Heliodorus (philosopher): Heliodorus (Greek: Ἡλιόδωρος ) is cited as the author of a work titled "Commentary" (dated 564 AD), which has been preserved, on the "Introduction" or "Rudiments" of Paulus Alexandrinus, the 4th century Alexandrian astrologer. The name "Heliodorus" appears only on the later of two groups of manuscripts, and so is somewhat doubtful. Leendert Westerink has argued that the commentary consists of notes of lectures, most likely given by the 6th-century philosopher and astrologer, Olympiodorus, in 564 AD. The Greek text of his commentary on Aristotle's "Nicomachean Ethics" has been published in vol. 19.2 of "Commentaria in Aristotelem Graeca" (CAG).
Document 9: Tetrabiblos: Tetrabiblos (Τετράβιβλος ) 'four books', also known in Greek as Apotelesmatiká (Ἀποτελεσματικά ) "Effects", and in Latin as Quadripartitum "Four Parts", is a text on the philosophy and practice of astrology, written in the 2nd century AD by the Alexandrian scholar Claudius Ptolemy ( AD 90– AD 168).
Document 10: Hyleg: In Hellenistic astrology, the hyleg is the Persian-Arabic term for the planet with the greatest essential dignity in five important natal chart positions (according to Ptolemy's "Tetrabiblos"):
Document 11: Yahya Ibn al-Batriq: Abu Yahya Ibn al-Batriq (working 796 - 806) was a Syrian scholar who pioneered the translation of ancient Greek texts into Arabic, a major early figure in the transmission of the Classics at the close of Late Antiquity. He translated for Al-Mansur the major medical works of Galen and Hippocrates, and also translated Ptolemy's "Tetrabiblos".
Document 12: Drekkana: Drekkana (Sanskrit: द्रेष्काण or द्रेक्काण ) is one of the sixteen main "vargas" (divisions of a sign) described by Parasara to Maitreya who wanted to be explained about the different kinds of houses (Brihat Parasara Hora Sastra (Sl. VI.1). Parasara states that relationship with co-borns is to be judged from the "drekkanas" occupied by planets. All standard ancient texts on Hindu astrology describe these "vargas". The actual disposition of a planet is properly known from its occupation of these sixteen "vargas". These sixteen sub-divisional charts which are one of the four dimensions of astrology are a basic ingredient of Hindu astrology, and each sub-divisional chart is firstly required to be studied independently and then collectively as one. M. Ramakrishna Bhat is of the opinion that "Drekkana" is not a Sanskrit word but borrowed from the Greek.
Document 13: Four Pillars of Destiny: The Four Pillars of Destiny (四柱命理) is a Chinese conceptual term describing the four components that supposedly create a person's destiny or fate. The four components within the moment of birth are year, month, day, and hour. The four pillars (a translation of the Chinese dynastic phrase "Shēng Chén Bā Zì; Korean Saju") are used alongside fortune-telling practices such as "Zǐ wēi dòu shù" within the realm of Chinese astrology. Chinese astrology believes the alignment of sun and stars affects a person's destiny. Ba Zi uses the alignment of sun's position, in other words the solar calendar, while "Zǐ wēi dòu shù" uses the alignment of moon and stars positions.
Document 14: Western astrology: Western astrology is the system of astrology most popular in Western countries. Western astrology is historically based on Ptolemy's "Tetrabiblos" (2nd century CE), which in turn was a continuation of Hellenistic and ultimately Babylonian traditions.
Document 15: Thrasyllus of Mendes: Thrasyllus of Mendes ( ; Greek: Θράσυλλος Μενδήσιος ), also known as Thrasyllus of Alexandria and by his Roman citizenship name Tiberius Claudius Thrasyllus ( Τιβέριος Κλαύδιος Θράσυλλος ; fl. second half of the 1st century BC and first half of the 1st century – died 36,), was an Egyptian Greek grammarian and literary commentator. Thrasyllus was an astrologer and a personal friend of the Roman emperor Tiberius, as mentioned in the "Annals" by Tacitus and "The Twelve Caesars" by Suetonius.
ground_truth: hyleg is the Persian-Arabic term for the planet