: a word whose immediate constituents are free forms (as the compound catfish) or a free form and a bound form (as the secondary derivative fisher)

When stacked, each thylakoid is able to increase their total surface area which allows more electron transport chains to be embedded into each thylakoid membrane.

Typical roots contain three different sections, or zones: the meristematic zone, the zone of elongation, and the zone of differentiation. In the meristematic zone, named after the apical meristem, the plant cells undergo rapid mitotic division, creating new cells for root growth.

A secondary root or lateral root is a side branch of the main root, a root or a fine rootlet that derives from the primary root. Secondary roots is also used to describe an adventitious root that develops on a stem or leaves.

noun, plural sec·ond·ar·ies. a person or thing that is secondary. a subordinate, assistant, deputy, or agent.

Secondary to means not of primary or main concern. Something that is secondary in importance does not mean that it is not important, it can still be very important, but something else (primary) is more relevant for the current discussion.

The definition of secondary is below the first, or coming from something original. An example of secondary is the color purple because it is made from two primary colors: red and blue; a secondary color. An example of secondary is the educational level that comes after primary and elementary school; a secondary school.

Secondary diagnoses are “conditions that coexist at the time of admission, that develop subsequently, or that affect the treatment received and/or length of stay.

Examples of secondary sources include:

• journal articles that comment on or analyse research.
• textbooks.
• dictionaries and encyclopaedias.
• books that interpret, analyse.
• political commentary.
• biographies.
• dissertations.
• newspaper editorial/opinion pieces.