| 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. |
| cell wall |
the rigid outermost layer of a plant cell, which is made of cellulose. |
| chromatin |
a protoplasmic substance in cell nuclei that contains the genes and forms the chromosomes. |
| chromosome |
one of the tiny, threadlike, DNA-containing bodies found in the cell nuclei of all plants and animals, responsible for transmitting hereditary characteristics. |
| Circadian rhythm |
the approximately 24-hour cycle apparent in plants and animals that regulates hormone production, cell regeneration, sleeping and feeding patterns, and the like. [1/2 definitions] |
| comb |
a honeycomb, or any cell structure resembling it. [1/9 definitions] |
| corpuscle |
a cell that moves freely in the blood, esp. one of the red or white blood cells. [1/2 definitions] |
| -cyte |
cell. |
| cyto- |
cell. |
| cytoplasm |
inherited genetic material in a cell not specified by its own nucleus. [1/2 definitions] |
| cytoplast |
the cytoplasmic structure of a cell. |
| dendrite |
a branching extension of a nerve cell that carries impulses to the cell body. [1/2 definitions] |
| diatom |
any of various tiny single-celled algae having cell walls of silica. |
| diploid |
in biology, having two of each non-sex-determining chromosome in each cell. [2/3 definitions] |
| dry battery |
a dry cell, or a battery made up of several connected dry cells. |
| dry cell |
an electric cell in which the electrolyte is in a paste, treated with an absorbent, or otherwise protected against spilling. |
| dungeon |
a jail or jail cell, esp. a dark, damp one underground. |
| ectoplasm |
the outer part of the material surrounding the nucleus of a cell. (Cf. endoplasm.) |
| effector |
a cell or an organ such as a muscle or gland that responds to a nerve impulse. |
| egg1 |
a reproductive cell within the female; ovum. [1/4 definitions] |
| electric eye |
see "photoelectric cell." |