nephridiumn.

Brit.

/nᵻˈfrɪdɪəm/, U.S.

/nəˈfrɪdiəm/

Inflections: Plural nephridia.

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek νεϕρός , -idium comb. form.

Etymology: < ancient Greek νεϕρός kidney (see nephro- comb. form) + -idium comb. form.

Zoology.

In certain invertebrate groups: an excretory or osmoregulatory tubule, typically paired, segmentally arranged, and opening to the exterior of the body.

ΘΚΠ

the world > animals > invertebrates > bodies or parts > [noun] > excretory organ or system

water tube1720

nephridium1877

1877 E. R. Lankester in Q. Jrnl. Microsc. Sci. 17 428 The Nephridia or segmental organs of the Entozoa.

1913 ‘W. N. P. Barbellion’ Jrnl. Disappointed Man (1919) 106 Just think what a much better figure I should have cut..had I remained a newspaper reporter who..could..patter off the difference between a nephridium and a cœlomic duct without turning a hair.

1940 G. S. Carter Gen. Zool. Invertebr. xv. 280 In the majority of invertebrate animals the excretory organ is either a nephridium (of the closed or open type), a cœlomoduct, i.e. a mesodermal excretory tube, or some derivative of these organs.

1963 R. P. Dales Annelids v. 109 In view of the lack of evidence that the nephridia do more than act as drains as far as nitrogenous wastes are concerned, we can but incline to the view that they are primarily osmoregulators.

2000 C. Tudge Variety of Life ii. vii. 234 Some organs, such as the nephridia, do occur in ‘serial’ repeats in some primitive molluscs such as chitons and solanogasters.

This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).

单词	nephridium
释义	nephridiumn. Brit. /nᵻˈfrɪdɪəm/, U.S. /nəˈfrɪdiəm/ Inflections: Plural nephridia. Origin: A borrowing from Greek, combined with an English element. Etymons: Greek νεϕρός , -idium comb. form. Etymology: < ancient Greek νεϕρός kidney (see nephro- comb. form) + -idium comb. form. Zoology. In certain invertebrate groups: an excretory or osmoregulatory tubule, typically paired, segmentally arranged, and opening to the exterior of the body. ΘΚΠ the world > animals > invertebrates > bodies or parts > [noun] > excretory organ or system water tube1720 nephridium1877 1877 E. R. Lankester in Q. Jrnl. Microsc. Sci. 17 428 The Nephridia or segmental organs of the Entozoa. 1913 ‘W. N. P. Barbellion’ Jrnl. Disappointed Man (1919) 106 Just think what a much better figure I should have cut..had I remained a newspaper reporter who..could..patter off the difference between a nephridium and a cœlomic duct without turning a hair. 1940 G. S. Carter Gen. Zool. Invertebr. xv. 280 In the majority of invertebrate animals the excretory organ is either a nephridium (of the closed or open type), a cœlomoduct, i.e. a mesodermal excretory tube, or some derivative of these organs. 1963 R. P. Dales Annelids v. 109 In view of the lack of evidence that the nephridia do more than act as drains as far as nitrogenous wastes are concerned, we can but incline to the view that they are primarily osmoregulators. 2000 C. Tudge Variety of Life ii. vii. 234 Some organs, such as the nephridia, do occur in ‘serial’ repeats in some primitive molluscs such as chitons and solanogasters. This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022). < n.1877
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