noun

• Initialism of human resources. [(management) The personnel department of an organization, dealing with the recruitment, administration, management and training of employees; abbreviated as HR.]
• (baseball) Initialism of home runs (in statistics).
• (genetics) Initialism of homologous recombination. [(genetics) The exchange of DNA between regions of homologous chromosomes that occurs during meiosis.]
• (philately) Initialism of hinge remnant.
• (law, politics) Initialism of house resolution.
• Initialism of heart rate. [The number of heart beats per unit of time, usually expressed as beats per minute.]
• Abbreviation of hour. [A time period of sixty minutes; one twenty-fourth of a day.]
• (computing) Initialism of horizontal rule.