Catecholamine
any of a group of chemically related neurotransmitters, as epinephrine and dopamine, that have similar effects on the sympathetic nervous system.
noun
any of a group of hormones that are catechol derivatives, esp adrenaline and noradrenaline
n.
type of hormone, from catechol (1880), from catechu, 17c. name for an astringent substance used in medicines, dyeing, etc., which apparently is from Malay kachu.
catecholamine cat·e·cho·la·mine (kāt’ĭ-kō’lə-mēn’, -kô’-)
n.
Any of a group of amines composed of a pyrocatechol molecule and the aliphatic portion of an amine that have important physiological effects as neurotransmitters and hormones, such as epinephrine, norepinephrine, and L-dopa.
catecholamine
(kāt’ĭ-kō’lə-mēn’, -kô’-)
Any of a group of amines derived from catechol that have important physiological effects as neurotransmitters and hormones and include epinephrine, norepinephrine, and dopamine.
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- Catechu
any of several astringent substances obtained from various tropical plants, especially from the wood of two East Indian acacias, Acacia catechu and A. suma: used in medicine, dyeing, tanning, etc. Historical Examples The extract is an efficient substitute for catechu and kino. Cooley’s Practical Receipts, Volume II Arnold Cooley For other dyes cotton has a […]
- Catechumen
Ecclesiastical. a person under instruction in the rudiments of Christianity, as in the early church; a neophyte. a person being taught the elementary facts, principles, etc., of any subject. noun (Christianity) a person, esp in the early Church, undergoing instruction prior to baptism n. “new convert,” 15c., from French catéchumène, from Church Latin catechumenus, from […]
- Catechumenal
Ecclesiastical. a person under instruction in the rudiments of Christianity, as in the early church; a neophyte. a person being taught the elementary facts, principles, etc., of any subject. noun (Christianity) a person, esp in the early Church, undergoing instruction prior to baptism n. “new convert,” 15c., from French catéchumène, from Church Latin catechumenus, from […]
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Ecclesiastical. a person under instruction in the rudiments of Christianity, as in the early church; a neophyte. a person being taught the elementary facts, principles, etc., of any subject. Historical Examples About the year 300, those desirous of being baptized were (a) admitted to the catechumenate, giving in their names to the bishop. Encyclopaedia Britannica, […]
- Categorematic
Traditional Logic. of or relating to a word having independent meaning so that it can be used as a term in a proposition. Contemporary Logic. of or relating to a word or symbol having an independent meaning apart from the context of other words or symbols. Historical Examples In the proposition, ‘Of’ was used more […]