heat definition In physics, a form of energy associated with the movement of atoms and molecules in any material. The higher the temperature of a material, the faster the atoms are moving, and hence the greater the amount of energy present as heat.
Cilia (singular: cilium) are microscopic, hair-like structures that extend outwardfrom the surface of manyanimal cells. These structures are important in the cell cycle and replication, and cilia play a vital part in human and animal development and in everyday life. A typical cilium is between one and ten micrometers long, and usually less than one micrometer wide.
Chambers 20th Century Dictionary(0.00 / 0 votes)Rate this definition: Cilia. silâ²i-a, n.pl. hair-like lashes borne by cells.âadjs. Cilâ²iary, Cilâ²iÄte, Cilâ²iÄted, Cilifâ²erous, having cilia; Cilâ²iÄ«form, very thin and slender like cilia.