Category: T

A fern with a straight, erect stem usually reaching a height of more than 6 ft (1.8 m) or sometimes as much as 50 ft (15 m) tall, bearing at its apex a crown of large fronds. Most of the world’s tree ferns belong to the genera Cyathea, Cibotium or Dicksonia and come from high-rainfall…

Strictly speaking, those regions lying between the tropic of Capricorn and the Arctic Circle and between the Tropic of Cancer and the Antarctic Circle, known as the north and south temperate zones respectively. Used in a more general way to refer to climates without extremes of heat or cold. Often subdivided approximately into cool-temperate, warm-temperate,…

The passing of desirable characteristics from the parent plant to seed-grown offspring; also called breeding true to type.  

A condition in which there is irregular metabolism of tyrosine. A rare genetic disorder due to a lack of parahydroxyphenylpyruvic acid oxidase, which catalyzes the conversion of tyrosine to homogentisic acid. Characterized by elevated blood and urine levels of tyrosine, liver damage, mental retardation, and rickets. An inborn defect of metabolism of the amino acid…

In a typical way.  

Inflammation of the cecum: formerly a common diagnosis of the condition now recognized as appendicitis. It is often encountered during profound chemotherapy-induced neutropenia. Cecal inflammation. A historical term used to refer to appendicitis.    

A behaviour pattern which is unlikely to contribute to coronary heart disease, in which an individual is patient, tolerant, not very competitive and lives at a more relaxed pace.  

A behaviour pattern which may contribute to coronary heart disease, in which an individual is aggressive and over-competitive, and usually lives at a stressful pace.  

Irreversible damage to the tympanic membrane and middle ear, starting with the replacement of tissues or fibrin by collagen and hyalin. Then calcification occurs, leading to deafness. Infiltration by hard fibrous tissue around the ossicles of the middle ear.  

The section of the ear between the eardrum and the inner ear, containing the three ossicles. The chamber behind the eardrum in the middle ear, which holds three oscillating bones that relay sound to the inner ear. This space is connected to the area behind the nasal passages through the Eustachian tube. Also known as…