Tertiary

Tertiary (from Latin, meaning 'third' or 'of the third degree/order..') may refer to:

Tertiary (period), an obsolete geologic period spanning from 66 to 2.6 million years ago
Tertiary (chemistry), a term describing bonding patterns in organic chemistry
Tertiary care, specialized consultative healthcare
Tertiary color, a color made up by mixing one primary color with one secondary color, in a given color space
Tertiary consumer, in ecology
Tertiary education, educational levels following the completion of secondary education such as university or trade school
Tertiary feathers or tertials, feathers attached to humerus or inner portion of the wings of birds
Tertiary sector of the economy, or the service sector
Tertiary source, in research
Tertiary stress, a proposed level of stress in phonetics
In biochemistry, the tertiary structure of a protein is its overall shape, also known as its fold
Tertiary, a member of a third order religious group

See also