aequilavium

Perhaps aequus (“equal; even”) +‎ lavō (“wash”) +‎ -ium, describing how wool loses half it weight after washing.[1] Compare to the semantically similar solox.

• (Classical) IPA^(key): /ae̯.kʷiˈla.u̯i.um/, [äe̯kʷɪˈɫ̪äu̯iʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /e.kwiˈla.vi.um/, [ekwiˈläːvium]

aequilavium n (genitive aequilaviī or aequilavī); second declension

1. (of wool) half of the whole

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

• “aequilavium”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• aequilavium in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• aequilavium in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.