astroid /asˈtroid/ (mathematics)

A hypocycloid with four cusps

• aerobatic
• aerobatics
• aerobe
• aerobes
• aerobic
• aerobically
• aerobics
• aerobiological
• aerobiologically
• aerobiologies
• aerobiologist
• aerobiologists
• aerobiology
• aerobiont
• aerobionts
• aerobioses
• aerobiosis
• aerobiotic
• aerobiotically
• aerobomb
• aerobombs
• apologist
• apologists
• apologize
• apologized