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| Explanation of vitamin C (noun) form: no plural organic substance found in fruit and vegetables; important for skin Sample of vitamin C Deficiency of vitamin C causes scurvy. Vitamin C is found in green, leafy vegetables, potatoes, tomatoes, fruits and berries.
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| Explanation of sexual intercourse (noun) form: no plural copulation Sample of sexual intercourse Sexual intercourse may or may not result in reproduction occurring. Sexual intercourse is defined as the penetration of the penis into the vagina: ejaculation is not required, and the offence is committed as soon as penetration takes place, although it has been held that the offence continues throughout penetration (so that if the woman revokes her consent during intercourse and the man fails to withdraw, he commits rape).
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| Explanation of tubulin (noun) form plural: tubulins protein which makes up microtubules Sample of tubulin Pairs of tubulin units assemble to form the microtubules. Microtubules, of which tubulin is the major protein constituent, are located in a circumferential band in the equatorial plane just under the cell wall in discoid platelets, which suggests that they may be important in maintenance of the platelet cytoskeleton.
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| Explanation of iron (noun) form: no plural trace element with the chemical symbol Fe Sample of iron Iron is a component of hemoglobin and myoglobin.
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| Explanation of fluoride (noun) form plural: fluorides ester of a particular acid Sample of fluoride Sodium Fluoride has the formula NaF.
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| Explanation of leukocyte (noun) form plural: leukocytes white blood cell Sample of leukocyte The protective association between the human leukocyte antigen HLA-B53 and severe malaria was investigated by sequencing of peptides eluted from this molecule followed by screening of candidate epitopes from pre-erythrocytic-stage antigens of Plasmodium falciparum in biochemical and cellular assays.
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| Explanation of suffocate (verb) forms: suffocated; suffocated; suffocating to asphyxiate Sample of suffocate Removing the air from an organism will suffocate it.
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| Explanation of severe (adjective) forms: more severe; most severe; the most severe serious; harsh Sample of severe He has a severe head injury and may die.
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| Explanation of significant (adjective) forms: more significant; most significant; the most significant important; highly relevant Sample of significant Statistics can tell us if a result is significant or not.
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| Explanation of microfilaments (noun) form: only plural fibers located throughout the cytoplasm of a cell Sample of microfilaments Microfilaments are involved in muscle contraction in which they are moved by actin and myosin.
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