1. A line connecting points on the earth's surface having the same mean summer temperature

Derived forms: isotheres

• vacant lot
• vacantly
• vacate
• vacation
• vacation home
• vacation spot
• vacationer
• vacationing
• vacationist
• vacatur
• Vaccaria
• Vaccaria hispanica
• Vaccaria pyramidata
• vaccina
• vaccinate
• vaccinated
• vaccinating
• vaccination
• vaccinator
• vaccine
• vaccinee
• vaccinia
• vaccinia gangrenosa
• Vaccinium
• Vaccinium angustifolium