| 单词 |
invaginate |
| 释义 |
▪ I. inˈvaginate, a. rare.
[ad. mod.L. type *invagīnāt-us, pa. pple. of *invagīnāre: see next.]
invaginated.
1887Amer. Naturalist XXI. 422 Invaginate gastrula.
▪ II. invaginate, v.|ɪnˈvædʒɪneɪt|
[f. mod.L. type *invagīnāre, f. L. in- (in-2) + vagīn-a sheath: see -ate3. Cf. mod.F. invaginer (Littré).]
1. trans.
a. To put in a sheath; to sheathe.
b. Phys. To turn or double (a tubular sheath) back within itself; to introvert.
1656Blount Glossogr., Invaginate, to sheath or put into a sheath. 1835–6[see invaginated ppl. a.]. 1861Hulme tr. Moquin-Tandon ii. iii. iii. 136 The pseudo chrysalis..is half invaginated in the cast-off skin of the second larval form. 1882H. S. Boase Creat. & Evol. vi. 138 The wall of the planula is next pushed in on one side, or invaginated, whereby it is converted into a double sac with an opening. 1885H. O. Forbes Nat. Wander. E. Archip. ii. 93 In some cases the rostellum (the upper margin of the stigma) is not invaginated down the stylary canal.
2. intr. To become invaginated.
1887Amer. Naturalist XXI. 422 The endoderm cells..will no longer immigrate one at a time, but will invaginate in a body, and thus in a more direct way establish a gastric cavity. |
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