deltoideus

From deltoid +‎ -eus. From Ancient Greek adjective δελτοειδής (deltoeidḗs). See also: δέλτα (délta), the fourth letter of the Greek alphabet.

• Rhymes: -ɔɪdiəs

deltoideus (not comparable)

1. Like a triangle, triangular.

deltoideus (plural deltoidei)

1. The deltoideus muscle.

• deltoid, deltoids
• delt, delts

• Encylopedia Brittanica

• deltoīdēs

deltoīdeus (feminine deltoīdea, neuter deltoīdeum); first/second-declension adjective

1. (New Latin) deltoid; triangular
   • 1855, J. D. Hooker, Thomas Thomson, Flora Indica: Being a Systematic Account of the Plants of British India, Together with Observations on the Structure and Affinities of Their Natural Orders and Genera, volume 1 (overall work in English), London: W. Pamplin, pages 201-202:

     C. peltata (H.f. et T.); foliis peltatis deltoideis basi subcordatis, petalis calyce campanulato 4-lobo dimidio brevioribus in cyathum irregulariter 4-lobum coalitis.-Menispermum peltatum, Lam. Cocculus peltatus, DC. Syst. i, 516, Prod. i. 96. Cissampelos discolor, Wall. Cat. 4982! (ex parte), non DC. nec Blume. C. barbata, Wall. Cat. 4978! Clypea Burmanni, W. et A. Prod. i. 14 (ex parte), non DC. Cyclea Burmanni, Arnott in Wight Ill. i. 22.—Rheed. Mal. vii. t. 49.
     HAB. In Zeylania, Walker! etc.; Malabaria et Carnatica australiori, Wight! Concan, Law! Assam, Jenkins! Khasia! Chittagong! Ava et Pegu, Wall.! Malacca, Griff.! Singapur, Wall.!—(v. v.)
     DISTRIB. Java, Spanoghe! (in Herb. Hook.)
     Frutex scandens. Caules sulcati, pilis laxis stramineis subreflexis sparsis hispiduli, rarius glabrescentes. Folia late deltoidea, margine subrepanda, acuta vel obtusiuscula, mucronata, tenuiter coriacea, 3-6 poll. longa, 2-4 lata, petiolo 1-2½-pollicari, supra glabra vel pilis paucissimis sparsis tecta, et margine ciliata, subtus pubescentia, tenuiter tomentosa vel rarius glabra.

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First/second-declension adjective.