Hist
[st, sst; spelling pronunciation hist] /st, sst; spelling pronunciation hɪst/
interjection
1.
(a sibilant exclamation used to attract attention).
1.
variant of before a vowel:
histidine.
1.
.
2.
.
3.
.
4.
.
/hɪst/
interjection
1.
an exclamation used to attract attention or as a warning to be silent
exclamation commanding silence, attested from 1610s; probably so chosen because the sound is both easy to hear and suddenly silent.
hist- pref.
Variant of histo-.
adjective
history: Hist! Goodbye!
1.
historian
2.
historical
3.
history
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[his-tuh-meen, -min] /ˈhɪs təˌmin, -mɪn/ noun 1. Biochemistry, Physiology. a heterocyclic amine, C 5 H 9 N 3 , released by mast cells when tissue is injured or in allergic and inflammatory reactions, causing dilation of small blood vessels and smooth muscle contraction. 2. Pharmacology. a commercial form of this compound, obtained from and used […]
- Histaminase
[hi-stam-uh-neys, -neyz] /hɪˈstæm əˌneɪs, -ˌneɪz/ noun, Biochemistry, Pharmacology. 1. an enzyme that catalyzes the decomposition of , used in treating allergies. /hɪˈstæmɪˌneɪs/ noun 1. an enzyme, occurring in the digestive system, that inactivates histamine by removal of its amino group Also called diamine oxidase histaminase his·tam·i·nase (hĭ-stām’ə-nās’, -nāz’, hĭs’tə-mə-) n. An enzyme that inactivates histamine […]
- Histamine
[his-tuh-meen, -min] /ˈhɪs təˌmin, -mɪn/ noun 1. Biochemistry, Physiology. a heterocyclic amine, C 5 H 9 N 3 , released by mast cells when tissue is injured or in allergic and inflammatory reactions, causing dilation of small blood vessels and smooth muscle contraction. 2. Pharmacology. a commercial form of this compound, obtained from and used […]