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acellular composed of only one cell; unicellular (used esp. in reference to protozoans and ciliates). [1/2 definitions]
actin any of a group of contractile proteins, including proteins involved in muscle contraction, cell motility, and maintenance of cellular shape.
alveolus a small cavity or pit, such as one of the terminal air sacs of the lungs or one cell of a honeycomb. [1/2 definitions]
amitosis direct cell division in which the nucleus divides without the formation of chromosomes. (Cf. mitosis.)
amoebocyte a cell that resembles or moves like an amoeba, such as a leukocyte.
apoptosis genetically regulated cell death that occurs as a normal part of growth and development, and which also occurs when a cell becomes damaged.
app a computer application designed for mobile operating systems and devices, such as cell phones. [1/2 definitions]
arachidonic acid an unsaturated fatty acid that is an important component of the cell membrane and is considered an essential nutrient in the diet of most mammals, including humans.
axon the part of a nerve cell that conducts impulses away from the cell body.
basidiomycete any of the fungi, such as mushrooms, puffballs, and smuts, that bear spores on a club-shaped cell.
basophil a tissue, substance, or cell, esp. a white blood cell, that readily takes on basic dyes.
B cell a type of white blood cell, produced in the bone marrow, that makes antibodies that fight off disease.
bilayer biological material composed of two layers of molecules, such as lipids in a cell membrane.
-blast bud, embryo, cell layer, or other generative unit.
brain cell a cell in the brain, esp. a neuron.
bull pen (informal) a place, usu. a cell, where prisoners are kept temporarily. [1/3 definitions]
cell line a cell culture produced from a single cell.
cellmate a person that one shares a prison or jail cell with.
cell membrane the semipermeable membrane that encloses the contents of a cell; plasma membrane.
cell phone a mobile telephone that operates using radio signals and therefore requires no wires. A cell phone is part of a system composed of many low-power radio transmitters located in "cells" across a region and will receive a radio signal from whichever transmitter in the system is closest; cellular phone.
cellular phone a mobile telephone that operates using radio signals and therefore requires no wires. A cellular phone is part of a system composed of many low-power radio transmitters located in "cells" across a region and will receive a radio signal from whichever transmitter in the system is closest; cell phone; mobile phone.