Arculum, vel arculus. A coll that women weare on their heads to beare water: a wrase.
Lewis and Short: Latin dictionary
arcŭla, ae, f.dim. [arca], a small chest or box, a casket, etc. I. For unguents, ornaments, etc. A.A small perfume - box, a jewel-casket, Plaut. Most. 1, 3, 91: arculae muliebres, Cic. Off. 2, 7, 25.—Hence, trop. of rhetor. ornament: omnes (Isocratis) discipulorum arculae, Cic. Att. 2, 1.—B.A small money-box or casket: arcula plena aranearum, Afran. ap. Fest. s. v. tanne, p. 154 (cf. Cat. 13, 8: Plenus sacculus est aranearum). —II.The wind-box of an organ, Vitr. 10, 13.—III. Arcula dicebatur avis, quae in auspiciis vetabat aliquid fieri, Paul. ex Fest. p. 16 Müll.
arcŭlum, i, n.dim. [arcus], a roll or hoop placed upon the head for the purpose of carrying the vessels at public sacrifices, Paul. ex Fest. p. 16 Müll.