The definition of central is something located in the center or middle, or the most basic or important part of something.
The definition of important is having great significance or consequence.
(Nautical) Connected to or located near the mainmast:
An organelle in the cytoplasm of eukaryotic cells (all cells except prokaryotes) that contains nearly all the cell's DNA and controls its metabolism, growth, and reproduction. The nucleus is surrounded by a pair of membranes called the nuclear envelope , which can be continuous in places with the membranes of the endoplasmic reticulum. The membranes of the nuclear envelope have interconnected pores that allow the exchange of substances with the cell's cytoplasm. The nuclear DNA is wrapped around proteins (called histones) in strands of chromatin , which exists in a matrix known as nucleoplasm (analogous to the cytoplasm outside the nucleus). Just prior to cell division, the chromatin condenses into individual chromosomes, which contain the cell's hereditary information. The nucleus also contains at least one spherical nucleolus , which mainly contains RNA and proteins and directs the construction of the cell's ribosomes.
The definition of principal is the first or highest in importance.
Something that serves to guide.
The point on the Earth's surface that is directly above the focus (the point of origin) of an earthquake. The epicenter is usually the location where the greatest damage associated with an earthquake occurs.
(Mathematics) A fixed point whose relationship with a directrix determines a conic section.
A focus of infection
Lace worked by the needle.
Find another word for focal. In this page you can discover 16 synonyms, antonyms, idiomatic expressions, and related words for focal, like: central, important, main, nucleus, principal, centrum, cynosure, epicenter, focus, nidus and omphalos.