h

The eighth letter of the English alphabet and the sixth consonant, representing the voiceless glottal fricative sound /h/. As a grapheme, 'H' is produced by exhaling air through an open glottis without vibration of the vocal cords. It is a letter frequently subject to elision in certain English dialects, where it is dropped entirely in words like 'herb' (American English) or 'hour'. It functions as a designation for the eighth item in a sequence, a chemical symbol for hydrogen, an abbreviation for height or hour, and a classification category.

ruВосьмая буква английского алфавита, согласная. Обозначает глухой глоттальный щелевой звук /h/. Часто выпадает в некоторых диалектах. Используется как символ водорода, обозначение часа, высоты, восьмого элемента в последовательности или категории.esOctava letra del alfabeto inglés, consonante. Representa el sonido fricativo glotal sordo /h/. A menudo se omite en algunos dialectos. Se usa como símbolo del hidrógeno, la hora, la altura, el octavo elemento de una secuencia o categoría.frHuitième lettre de l'alphabet anglais, consonne. Elle note la consonne fricative glottale sourde /h/. Souvent muette dans certains dialectes. Elle sert de symbole pour l'hydrogène, d'abréviation pour l'heure, la hauteur, le huitième élément d'une séquence ou d'une catégorie.deAchter Buchstabe des englischen Alphabets, ein Konsonant. Bezeichnet den stimmlosen glottalen Frikativ /h/, der in manchen Dialekten oft ausfällt. Wird als Symbol für Wasserstoff, die Stunde, die Höhe, das achte Element einer Reihenfolge oder eine Kategorie verwendet.ptOitava letra do alfabeto inglês, uma consoante. Representa o som fricativo glotal surdo /h/, que costuma ser omitido em alguns dialetos. É usada como símbolo do hidrogênio, para indicar hora, altura, o oitavo item de uma sequência ou a categoria H.zh英语字母表的第八个字母，为辅音字母。通常表示清声门擦音 /h/，在一些方言中常脱落。也用作化学元素氢的符号、小时、高度、序列或类别中第八个的标记。arالحرف الثامن في الأبجدية الإنجليزية، وهو حرف ساكن يمثل صوتاً حلقياً مهموساً /h/. يُستخدم رمزاً للهيدروجين، وللإشارة إلى الساعة أو الارتفاع أو العنصر الثامن في متتالية أو فئة.

1. The eighth letter of the English alphabet A1 formal

   The uppercase or lowercase character (H, h) that constitutes the eighth symbol in the Latin-based English alphabet, classified as a consonant. It represents a voiceless glottal fricative produced by a gentle exhalation with the vocal cords held apart. The pronunciation of its name, 'aitch', is a notable exception to typical letter names as it begins with a vowel rather than the consonant it represents. In some dialects, particularly Cockney and certain regional British accents, the /h/ sound is frequently dropped in speech.

   • The word 'house' begins with the letter H.
   • She pronounces the H in 'herb', unlike most Americans.
   • The silent H in 'hour' can confuse English learners.
   • He wrote a capital H with two vertical lines connected by a horizontal bar.
   • Dropping one's H's is a feature of Cockney dialect.

   ruВосьмая буква английского алфавитаesletra hfrhuitième lettre de l'alphabet anglaisdeAchter Buchstabe des englischen AlphabetsptOitava letra do alfabeto inglêszh英文字母第八个字母arالحرف الثامن في الأبجدية الإنجليزية

2. The chemical symbol for hydrogen B1 formal scientific

   The one-letter chemical symbol representing the element hydrogen, atomic number 1 on the periodic table. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. It is a colorless, odorless, highly flammable diatomic gas (H₂) at standard temperature and pressure and serves as a crucial component in water, organic compounds, and potential clean energy sources.

   • Water has the chemical formula H₂O, containing two H atoms.
   • Hydrogen, symbolized by H, is the lightest element on the periodic table.
   • The Hindenburg disaster highlighted the dangers of using H as a lifting gas.
   • Green H produced from renewable energy is a promising clean fuel.
   • The sun fuses H into helium through nuclear fusion.

   ruХимический символ водородаesSímbolo químico del hidrógenofrSymbole chimique de l'hydrogènedeChemisches Symbol für WasserstoffptSímbolo químico do hidrogêniozh氢的化学符号arالرمز الكيميائي للهيدروجين

3. An abbreviation for hour or hours A1 formal

   The letter H used as a standard abbreviation or symbol for the unit of time known as an hour, equal to 60 minutes or 3,600 seconds. This notation is commonly employed in timetables, schedules, scientific measurements, digital clocks, business operating hours, and technical specifications where the lowercase 'h' indicates the duration of time, especially in the metric-styled format (e.g., km/h for kilometers per hour).

   • The store's opening hours are 9 h to 17 h on weekdays.
   • The speed limit on the highway is 120 km/h.
   • The event is scheduled to last approximately 3 h.
   • She earns $15/h at her part-time job.
   • The flight duration was listed as 8 h 45 min.

   ruЧас, единица времениesSímbolo de horafrabréviation de heuredeStunde, ZeiteinheitptHora, unidade de tempozh小时，时间单位arالساعة، وحدة زمن

4. The eighth item in a sequence or classification A2 formal

   A designation used to mark the eighth position, item, or category within a structured sequence, directly following G. It is frequently applied in outlines, options in multiple-choice tests, hierarchical grading systems, sizing charts, and row or section labeling in venues. Being the eighth letter, it occupies the midpoint of the standard 26-letter English alphabet.

   • Our seats are in Row H, which offers a great view of the stage.
   • The multiple-choice question included Options F, G, H, and I.
   • The company classifies H-tier customers as the highest priority.
   • Section H of the report contains the financial projections.
   • The recipe's Step H involves letting the dough rise for an hour.

   ruВосьмой в последовательности или классификацииeshache, octava letrafrHuitième élément d'une séquencedeDer achte in einer Reihenfolge oder KlassifikationptOitavo em uma sequência ou classificaçãozh序列或分类中的第八项arالثامن في التسلسل أو التصنيف

5. An abbreviation for height in measurement A2 formal

   The letter H used as a standard abbreviation for height or vertical dimension in architectural plans, engineering drawings, mathematical formulas, medical charts, and everyday shorthand. It frequently appears in product specifications, clothing size guides, health records, and geometry, where it denotes the perpendicular distance from the base to the top of an object, person, or shape.

   • The box dimensions are listed as W 50cm x H 75cm x D 40cm.
   • Her height is recorded as H: 165 cm on the medical chart.
   • The formula for the area of a triangle is 1/2 × b × h.
   • The architect labeled the ceiling h at 3 meters on the plan.
   • Enter your height in the field marked H on the application form.

   ruВысота (аббревиатура)esH como abreviación de alturafrAbréviation pour la hauteurdeHöhe (Abkürzung)ptAltura (abreviaturas)zh高度（缩写）arالارتفاع (اختصار)