infolding
61gland — Organ specialized for secretion by the infolding of an epithelial sheet. The secretory epithelial cells may either be arranged as an acinus with a duct or as a tubule. Glands from which release occurs to a free epithelial surface are exocrine;… …
62involution — (1) Restoration of the normal size of an organ. (2) Infolding of the edges of a sheet of cells, as in some developmental processes, notably gastrulation …
63neural plate — A region of embryonic ectodermal cells, called neuroectoderm, that lie directly above the notochord. During neurulation, they change shape, so as to produce an infolding of the neural plate (the neural fold) that then seals to form the neural… …
64hairfollicle — hair follicle n. A tubular infolding of the epidermis containing the root of a hair. * * * …
65annelid — /an l id/, n. 1. any segmented worm of the phylum Annelida, including the earthworms, leeches, and various marine forms. adj. 2. belonging or pertaining to the Annelida. Also, annelidan /euh nel i dn/. [1825 35; see ANNELIDA] * * * Any member of… …
66moss animal — bryozoan. [1880 85] * * * ▪ invertebrate Introduction also called bryozoan, any member of the phylum Bryozoa (also called Polyzoa or Ectoprocta), in which there are about 5,000 extant species. Another 15,000 species are known only from… …
67notochord — notochordal, adj. /noh teuh kawrd /, n. Embryol. a rodlike cord of cells that forms the chief axial supporting structure of the body of the lower chordates, as amphioxus and the cyclostomes, and of the embryos of the vertebrates. [1840 50; NOTO + …
68phagocytosis — /fag euh suy toh sis/, n. Physiol. the ingestion of a smaller cell or cell fragment, a microorganism, or foreign particles by means of the local infolding of a cell s membrane and the protrusion of its cytoplasm around the fold until the material …
69protist — protistan /proh tis teuhn/, adj., n. protistic, adj. /proh tist/, n. any of various one celled organisms, classified in the kingdom Protista, that are either free living or aggregated into simple colonies and that have diverse reproductive and… …
70scorpion — scorpionic /skawr pee on ik/, adj. /skawr pee euhn/, n. 1. any of numerous arachnids of the order Scorpionida, widely distributed in warmer parts of the world, having a long, narrow, segmented tail that terminates in a venomous sting. 2. the… …
