photo-, phot-, -photic +

The making of a motion picture of microscopic objects; time lapse photography is often used.

1. An instrument that uses the variations in light intensity produced by stained cell cytoplasm to identify and locate chemical compounds within cells.
2. A photometer that can be used to locate and identify chemical compounds in a cell by measuring the intensity of the light that passes through stained sections of the cytoplasm.

1. Of or relating to the study of cells by means of a cytophotometer.
2. Relating to cytophotometry, or measured using a cytophotometer.

1. The study of chemical compounds inside a cell by means of a cytophotometer.
2. The study of cells and chemical compounds within cells by means of a cytophotometer.
3. A method of measuring the absorption of monochromatic light by stained microscopic structures; for examlple, chromosomes, nuclei, and whole cells, with the aid of a photoelectric cell.

Also used to measure emitted light from such objects by fluorescence in combination with selected fluorochrome dyes.

An orientation response of an organism or structure at right angles to the direction of incident light.

A tendency of leaves or other organs of plants to have their dorsal surface faced towards the rays of light.

Orientation at a right angle to the direction of incident light.

The zone of intermediate light inensity in a body of water, with insufficient light for photosynthesis but sufficient light for behavioral responses.

The mental association of sound tones, or certain sounds, with particular colors.

A colorimeter that uses a phototube or photocell, a set of color filters, an amplifier, and an indicating meter for quantitative determination of color.

Phototherapy (light treatment) in which the source of the rays is the electric light.

1. The surface zone in a sea or large lake that has sufficient light penetration for net photosynthesis to occur.
2. A reference to the upper layer of a body of water that allows the penetration of enough light to support photosynthetic, or green plants.

Orientation response of plant structures to maximize incident illumination; euphototropic.

1. Tolerant of a wide range of light intensities.
2. The ability to adapt to seeing within a large range of light emissions.

The photography of images produced on a fluorescent screen by X-rays.