名詞 diarthrosis:

1. a joint so articulated as to move freely
   同義詞：synovial joint, articulatio synovialis

di.ar.thro.sis

n.（名詞）
【復(fù)數(shù)】 di.ar.thro.ses[-sôz]
Any of several types of bone articulation permitting free motion in a joint, as that of the shoulder or hip.
可動(dòng)關(guān)節(jié)：可自由活動(dòng)的骨關(guān)節(jié)，如肩膀關(guān)節(jié)或髖關(guān)節(jié)

來(lái)源：
Greek diarthrôsis
希臘語(yǔ) diarthrôsis
from diarthroun [to articulate]
源自 diarthroun [連接]
dia- [between] * see dia-
dia- [在…之間] *參見(jiàn) dia-
arthroun [to fasten by a joint] from arthron [joint] * see ar-
arthroun [通過(guò)接合固定] 源自 arthron [聯(lián)合] *參見(jiàn) ar-

【引伸】
di.arthro.dial