taxi-, tax-, taxo-, taxio-, -taxia, -taxis, -taxy, tact-, -tactic, -tactical, -tactics
(Greek: arrangement, order, put in order, orientation; the movements or directed responses of motile organisms to stimuli, as indicated by the combining roots)
Phonotactics defines permissible syllable structure, consonant clusters, and vowel sequences by means of phonotactical constraints.
Photophobotaxis can be explained by a cell or living thing moving towards the intensity of brilliance, termed as positive, or moves away from the source, termed as negative.
2. Taxis of an organism elicited in response to the source of a light stimulus.
3. In botany, the movement of a part of a plant toward or away from light sources.
- Cyclical or verticillate, in which a number of leaves (two or more) stand at the same level, forming a pair or whorl.
- Spiral or alternate, in which each leaf stands singly, with its points of insertion forming a spiral (the genetic spiral) around the stem.
The principal kinds of phyllotaxis are
In the latter case, the phyllotaxis is expressed by a fraction denoting the angle (or portion of one turn of the spiral) between two successive leaves; thus, in a 25 phyllotaxis, there are five leaves in every two turns of the spiral.
The three common positions are alternate, opposite, and verticillate.2. The principles governing leaf arrangement.
When spiral, often expressed quantitatively as the fraction of the circumference of the stem that separates two successive leaves.
2. Having more than the normal number of parts.
2. Concerning the regulation of the pulmonary respiration rate.