Bot. [ad. mod.L. arillus (also in use; cf. mod.F. arille), f. med.L. arilli, Sp. arillos, raisins.] See quot.
1794. Martyn, Rousseau’s Bot., xvi. 208. Two seeds covered with an aril or detached coat.
1857. Henfrey, Elem. Bot., § 297. The mace of the nutmeg is an arillus, adhering both to the hilum and micropyle.
1870. Hooker, Stud. Flora, 14. A sac-like fleshy aril.
1880. Gray, Bot. Text-Bk., viii. 308. The true arillus is an accessory seed-covering, more or less incomplete, formed between the time of fertilization and the ripening of the seed, by a growth from the apex of the funiculus, at or just below the hilum.
Hence the derivatives: Arillary, a. of or pertaining to the aril. Arillate, Arillated, Arilled, ppl. a., furnished or covered with an aril. Arilliform a., having the form of an aril (A. Gray, 1880). Arillode, a false aril, which originates from the micropyle or rhaphe.
1880. Syd. Soc. Lex., The arillary tunic.
1830. Lindley, Nat. Syst. Bot., 148. Arillate seeds.
1870. Hooker, Stud. Flora, 13. Nymphæaceæ … seeds naked or arillate.
1876. Harley, Mat. Med., 379. Seeds many, arilled.
1854. Balfour, Bot., 262. A false or micropylar aril, or sometimes Arillode.
1857. Henfrey, Elem. Bot., § 297. Recent authors distinguish the true arillus … from the arillode, which originates at or near the micropyle.
