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This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
The stem of a plant, especially a woody one; also used to mean a rootstock, or particularly a basal stem structure or storage organ from which new growth arises. Compare lignotuber. caudiciform Stem-like or caudex-like; sometimes used to mean "pachycaul", meaning "thick-stemmed". caulescent possessing a well-developed stem above ground, similar ...
Articulation (botany), a joint between two separable parts, as a leaf and a stem; see Glossary of botanical terms Articulation (dentistry) , the contact relationship of the occlusal surfaces of the upper and lower teeth when moving into and away from centric occlusion
A joint or articulation (or articular surface) is the connection made between bones, ossicles, or other hard structures in the body which link an animal's skeletal system into a functional whole.
Articulate brachiopods have an outermost periostracum made of proteins, a "primary layer" of calcite (a form of calcium carbonate) under that, and innermost a mixture of proteins and calcite. [9] Inarticulate brachiopod shells have a similar sequence of layers, but their composition is different from that of articulated brachiopods and also ...
Articulate brachiopods, brachiopods with toothed hinges and simple opening and closing muscles; Articulate sound, to move the tongue, lips, or other speech organs in order to make speech sounds; Articulated vehicle, a vehicle which has a pivoting joint in its construction; Articulate, a public television series about creative artists
Anatomical terms are not included here and appear in sub-categories of the main Anatomy category. Initially, some alignment between this category and the article Glossary of biology was considered, but the inclusion criteria for the Glossary is substantially broader and encompasses terminology, concepts, objects and processes.
A hinge line is an imaginary longitudinal line along the dorsal edge of the shell of a bivalve mollusk where the two valves hinge or articulate. The hinge line can easily be perceived in these images of a mussel shell and an ark shell .