As nouns the difference between lactone and parthenolide

is that lactone is (organic chemistry) a cyclic intramolecular ester derived from a hydroxy acid while parthenolide is (organic compound) a sesquiterpene lactone which occurs naturally in the plant feverfew (tanacetum parthenium ); used for the relief of migraine.

As nouns the difference between feverfew and parthenolide

is that feverfew is a european aromatic perennial herb, tanacetum parthenium'' (or ''chrysanthemum parthenium'' or ''pyrethrum parthenium ), having daisy-like flowers; valued as a traditional medicine especially for headaches while parthenolide is (organic compound) a sesquiterpene lactone which occurs naturally in the plant feverfew (tanacetum parthenium ); used for the relief of migraine.

As nouns the difference between migraine and parthenolide

is that migraine is a severe, disabling headache, usually affecting only one side of the head, and often accompanied by nausea, vomiting, photophobia and visual disturbances while parthenolide is a sesquiterpene lactone which occurs naturally in the plant feverfew (Tanacetum parthenium); used for the relief of migraine.

As adjectives the difference between shirtless and barechested

is that shirtless is not wearing a shirt. Having a bare torso while barechested is shirtless.

As nouns the difference between rate and flowrate

is that rate is rot (process of something decaying or rotting ) while flowrate is the rate of flow, usually of a fluid, measured in volume per unit time.

As nouns the difference between flow and flowrate

is that flow is a movement in people or things with a particular way in large numbers or amounts while flowrate is the rate of flow, usually of a fluid, measured in volume per unit time.

As a verb flow

is to move as a fluid from one position to another.

In biology terms the difference between presymbiosis and asymbiosis

is that presymbiosis is the stage in the development of an organism during which the necessary biochemical changes are made to allow a move from asymbiosis to symbiosis while asymbiosis is a lack of symbiosis, especially in an organism that otherwise exhibits symbiosis.

In biology terms the difference between symbiosis and presymbiosis

is that symbiosis is a close, prolonged association between two or more organisms of different species, regardless of benefit to the members while presymbiosis is the stage in the development of an organism during which the necessary biochemical changes are made to allow a move from asymbiosis to symbiosis.

As nouns the difference between symbiosis and presymbiosis

is that symbiosis is a relationship of mutual benefit while presymbiosis is the stage in the development of an organism during which the necessary biochemical changes are made to allow a move from asymbiosis to symbiosis.

In biology terms the difference between parasite and biotroph

is that parasite is an organism that lives on or in another organism, deriving benefit from living on or in that other organism, while not contributing towards that other organism sufficiently to cover the cost to that other organism while biotroph is any parasite that cannot survive in a dead host and therefore keeps it alive.

As nouns the difference between parasite and biotroph

is that parasite is a person who lives on other people's efforts or expense and gives little or nothing back while biotroph is any parasite that cannot survive in a dead host and therefore keeps it alive.

As nouns the difference between host and biotroph

is that host is autumn (season) while biotroph is (biology) any parasite that cannot survive in a dead host and therefore keeps it alive.