| 释义 |
Definition of gubernaculum in English: gubernaculumnoun ˌɡjuːbəˈnakjʊləm 1Originally: = gubernaculum testis. In later use also: an analogous cord of connective tissue attached to the ovary in a female fetus, which is the precursor of the round and ovarian ligaments. 2More fully "gubernaculum dentis". A cord or sheath of connective tissue that connects the sac of an unerupted permanent tooth with the surface of the gum. 3Zoology. The reproductive tract of an invertebrate, or part of it; especially the section containing the gonophores (in a hydrozoan); a sclerotized structure in the cloaca (in a nematode). 4Biology. In certain protists: a trailing flagellum used for steering. Now rare.
Origin Mid 17th century (in an earlier sense). From classical Latin gubernāculum steering oar of a ship, in post-classical Latin also each of the hind legs of a locust from gubernāre + -culum. Definition of gubernaculum in US English: gubernaculumnounˌɡjuːbəˈnakjʊləm 1Originally: = gubernaculum testis. In later use also: an analogous cord of connective tissue attached to the ovary in a female fetus, which is the precursor of the round and ovarian ligaments. 2More fully "gubernaculum dentis". A cord or sheath of connective tissue that connects the sac of an unerupted permanent tooth with the surface of the gum. 3Zoology. The reproductive tract of an invertebrate, or part of it; especially the section containing the gonophores (in a hydrozoan); a sclerotized structure in the cloaca (in a nematode). 4Biology. In certain protists: a trailing flagellum used for steering. Now rare.
Origin Mid 17th century (in an earlier sense). From classical Latin gubernāculum steering oar of a ship, in post-classical Latin also each of the hind legs of a locust from gubernāre + -culum. |