v. i. & t. [ imp. & p. p. Evaginated; p. pr. & vb. n. Evaginating. ] To become evaginate; to cause to be evaginate. [ Webster 1913 Suppl. ]

a. [ L. evaginatus, p. p., unsheathed. See Evagination. ] Protruded, or grown out, as an evagination{ 2 }; turned inside out; unsheathed; evaginated; as, an evaginate membrane. [ Webster 1913 Suppl. ]

n. [ L. evaginatio an extending, evaginare to unsheathe; e out + vagina sheath. ] 1. The act of unsheathing. [ 1913 Webster ]

2. An outgrowth or protruded part. [ Webster 1913 Suppl. ]

v. t. To insert as in a sheath; to produce intussusception in.

{ } a. (Biol.) (a) Sheathed. (b) Having one portion of a hollow organ drawn back within another portion. [ 1913 Webster ]

n. [ L. pref. in- + vagina sheath. ] [ 1913 Webster ]

1. (Biol.) The condition of an invaginated organ or part. [ 1913 Webster ]

2. The inward movement of the wall of a tissue or cell, to form a cavity; also, the cavity thus formed. [ PJC ]

3. Specifically: (Biol., Embryology) The inward movement of one part of the wall of a blastula, to form a gastrula; the process of gastrulation, in which layers of the ovum are differentiated. [ 1913 Webster +PJC ]

☞ In embolic invagination, one half of the blastosphere is pushed in towards the other half, producing an embryonic form known as a gastrula. -- In epibolic invagination, a phenomenon in the development of some invertebrate ova, the epiblast appears to grow over or around the hypoblast. [ 1913 Webster ]

a. (Anat.) Of or pertaining to both the rectum and the vagina. [ 1913 Webster ]

a. (Anat.) Situated under or inside a sheath or vaginal membrane; as, the subvaginal, or subdural, spaces about the optic nerve. [ 1913 Webster ]

a. (Anat.) Situated above or outside a sheath or vaginal membrane. [ 1913 Webster ]

n. [ Uterus + vaginal. ] Pertaining to both the uterus and the vagina. [ 1913 Webster ]

n.; pl. Vaginae [ L. vagina a scabbard or sheath. ] [ 1913 Webster ]

1. (Anat.) (a) A sheath; a theca; as, the vagina of the portal vein. (b) Specifically, the canal which leads from the uterus to the external orifice of the genital canal, or to the cloaca. [ 1913 Webster ]

2. (Zool.) The terminal part of the oviduct in insects and various other invertebrates. See Illust., of Spermatheca. [ 1913 Webster ]

3. (Bot.) The basal expansion of certain leaves, which inwraps the stem; a sheath. [ 1913 Webster ]

4. (Arch.) The shaft of a terminus, from which the bust or figure seems to issue or arise. [ 1913 Webster ]

a. [ Cf. F. vaginal. ] [ 1913 Webster ]

1. Of or pertaining to a vagina; resembling a vagina, or sheath; thecal; as, a vaginal synovial membrane; the vaginal process of the temporal bone. [ 1913 Webster ]

2. (Anat.) Of or pertaining to the vagina of the genital canal; as, the vaginal artery. [ 1913 Webster ]

a. [ Cf. F. vaginant. See Vagina. ] Serving to invest, or sheathe; sheathing. [ 1913 Webster ]

Vaginant leaf (Bot.), a leaf investing the stem or branch by its base, which has the form of a tube. [ 1913 Webster ]

{ } a. [ See Vagina. ] Invested with, or as if with, a sheath; as, a vaginate stem, or one invested by the tubular base of a leaf. [ 1913 Webster ]

‖n. pl. [ NL. ] (Zool.) A tribe of birds comprising the sheathbills. [ 1913 Webster ]

a. (Anat.) Of or pertaining to the bladder and the vagina. [ 1913 Webster ]

a. (Anat.) Pertaining both to the vulva and the vagina. [ 1913 Webster ]