‖ tigelle Bot.
(tiːˈʒɛl)
Also tigel, and in L. form tigella (tɪˈdʒɛlə), (erron. tiˈgellum, tiˈgellus).
[F. tigelle caulicle, radicle, dim. of tige.
(Tibia, tige, tigelle are fem., hence the correct Latin form is tigella.)]
The embryonic axis or primitive stem, which bears the cotyledons; the caulicle or radicle. Sometimes applied to the plumule, which is properly the growing top of the tigelle. Hence tigellate (ˈtɪdʒɛleɪt) a., having a tigelle; tigellule (tɪˈdʒɛljʊl), see quot. 1860; whence tiˈgellular a., pertaining to or of the nature of a tigellule.
| 1860 Mayne Expos. Lex., Tigella, term for that part of the vegetable embryo which unites the radicle to the cotyledon. Ibid., Tigellatus, applied to the plumula when supplied with a visible tigella, as in the Faba: tigellate. Ibid., Tigellular. Ibid., Tigellula, term by Turpin for the short and sterile filaments which are one of the two elementary organs of the mass of the truffle: a tigellule. 1866 Treas. Bot., Tigellate, having a short stalk, as the plumule of a bean. 1900 B. D. Jackson Gloss. Bot. Terms 271/1 Tigelle, Tigella,..a miniature or initial stem, used for (a) caulicle or hypocotyl, (b) plumule. |