† ommateumn.

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek ὄμματ-, ὄμμα, English -eum.

Etymology: < ancient Greek ὄμματ-, ὄμμα eye ( < the same base as ὄψ eye: see optic adj.) + -eum (after classical Latin nouns in -ēum). O.E.D. Suppl. (1982) gives the pronunciation as (ǫmătī·ɒ̆m) /ɒməˈtiːəm/.

Zoology. Obsolete.

The soft tissue apart from the lens in a simple eye of an invertebrate. Also: a compound eye.

ΘΚΠ

the world > animals > animal body > general parts > head and neck > [noun] > tissue of eye

ommateum1883

1883 E. R. Lankester & G. C. Bourne in Q. Jrnl. Microsc. Sci. 23 182 This enlarged portion of the hypodermis is, in fact, the soft or living tissue of the eye [of the Scorpion], and may be distinguished from the lens in front of it by a special name. We propose to call it the ‘ommatēum’. The ommateum and the lens together form the eye.

1889 Philos. Trans. 1888 (Royal Soc.) B. 179 169 The mass of the ommateum is of exclusively hypodermic origin, while the capsule is mesoblastic.

1898 A. S. Packard Text-bk. Entomol. 250 (heading) The compound or facetted eye (ommateum).

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online September 2019).

单词	ommateum
释义	† ommateumn. Origin: A borrowing from Greek, combined with an English element. Etymons: Greek ὄμματ-, ὄμμα, English -eum. Etymology: < ancient Greek ὄμματ-, ὄμμα eye ( < the same base as ὄψ eye: see optic adj.) + -eum (after classical Latin nouns in -ēum). O.E.D. Suppl. (1982) gives the pronunciation as (ǫmătī·ɒ̆m) /ɒməˈtiːəm/. Zoology. Obsolete. The soft tissue apart from the lens in a simple eye of an invertebrate. Also: a compound eye. ΘΚΠ the world > animals > animal body > general parts > head and neck > [noun] > tissue of eye ommateum1883 1883 E. R. Lankester & G. C. Bourne in Q. Jrnl. Microsc. Sci. 23 182 This enlarged portion of the hypodermis is, in fact, the soft or living tissue of the eye [of the Scorpion], and may be distinguished from the lens in front of it by a special name. We propose to call it the ‘ommatēum’. The ommateum and the lens together form the eye. 1889 Philos. Trans. 1888 (Royal Soc.) B. 179 169 The mass of the ommateum is of exclusively hypodermic origin, while the capsule is mesoblastic. 1898 A. S. Packard Text-bk. Entomol. 250 (heading) The compound or facetted eye (ommateum). This entry has been updated (OED Third Edition, March 2004; most recently modified version published online September 2019). < n.1883
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