syn-, sy-, sym-, syl-, sys-

The origin of a Latin numerical symbol: The number V (5) is said to represent the hand with all five fingers spread apart.

Extensive information about Latin numerals.

Extensive information about Greek numerals.

The larger of two symbionts.

The larger of two symbiotic organisms.

1. Applied to one symbiont that is noticeably smaller than the other.
2. The smaller of two symbiotic organisms.

A symbiosis between an ant and its host plant.

A symbiosis established between two living organisms in which one symbiont continues to use the other as a food source even after complete or partial death has occurred.

Referring to the sympathetic or thoracolumbar (chest and ower back from just below the ribs to the pelvis portions of the vertebral column) division of the autonomic nervous system as distinct from the parasympathetic (neurons that are not under conscious control) or craniosacral division.

1. When one symbiont damages another. It is similar to parasitism.
2. The ability of two different types of organisms to exist closely with one another without giving an advantage or disadvantage to the other.
3. The relationship between a free-living lichen and another lichen or fungus which infests it and establishes a symbiotic relationship with the algae of the lichen.

Of, pertaining to, or designating one of the major divisions of the autonomic nervous system, distinguished from the sympathetic system by its place of origin, its use of acetylcholine as a transmitter, and its general association with rest and recuperation rather than alertness.

A quality that's never wasted except when given to oneself: empathy, sympathy quotes.

Producing, or imitating, effects similar to those of ionizing radiations.