plantar calcaneonavicular ligament
noun
plantar cal·ca·neo·na·vic·u·lar ligament
| \ -(ˌ)kal-ˌkā-nē-ō-nə-ˈvik-yə-lər-
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Medical Definition of plantar calcaneonavicular ligament
: an elastic ligament of the sole of the foot that connects the calcaneus and navicular bone and supports the head of the talus
— called also spring ligament