The term 'short jackets worn open in front' can be summarized as boleros, which are seven-letter garments. Boleros are short jackets that are typically worn open in the front and are often made of lightweight fabrics such as silk or lace. They are usually designed with long sleeves and are often decorated with intricate embroidery or beading. Boleros are a popular fashion choice for formal occasions, such as weddings or proms, and can also be worn casually.