| ha | An exclamation denoting surprise, joy, or grief. Both as uttered and as written, it expresses a great variety of emotions, determined by the tone or the context. When repeated, ha, ha, it is an expression of laughter, satisfaction, or triumph, sometimes of derisive laughter; or sometimes it is equivalent to "Well, it is so." "Ha-has, and inarticulate hootings of satirical rebuke." (Carlyle) (16 Mar 1998) |
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| HA1 virus | parainfluenza virus type 3 |
| HA2 virus | parainfluenza virus type 1 |
| haaf | The deepsea fishing for cod, ling, and tusk, off the Shetland Isles. Origin: Of Scand. Origin; cf. Icel. & Sw. Haf the sea, Dan. Hav, perh. Akin to E. Haven. Source: Websters Dictionary (01 Mar 1998) |
| haak | <marine biology> A sea fish. See Hake. (16 Mar 1998) |
| haarscheibe tumour | Dominantly inherited or nonfamilial elliptical parafollicular mesenchymal hamartomas. Synonym: haarscheibe tumour. (05 Mar 2000) |
| Haase's rule | The length of the foetus in centimeters, divided by 5, is the duration of pregnancy in months, i.e., the age of the foetus. (05 Mar 2000) |
| habena | 1. A frenum or restricting fibrous band. 2. A restraining bandage. Synonym: habenula. Origin: L. Strap (05 Mar 2000) |
| habenal | Relating to a habena. (05 Mar 2000) |
| habenula | A small protuberance at the dorsal, posterior corner of the wall of the third ventricle, adjacent to the dorsal thalamus and pineal body. It contains the habenular nuclei and is a major part of the epithalamus. (12 Dec 1998) |
| habenula of caecum | Extension of the mesocolic tenia, dorsal or ventral to the terminal ileum. (05 Mar 2000) |
| habenula urethralis | One of two fine, whitish lines running from the meatus urethrae to the clitoris in girls and young women; the vestiges of the anterior part of the corpus spongiosum. (05 Mar 2000) |
| habenulae perforata | The perforations along the tympanic lip of the spiral lamina giving passage to the cochlear nerves. Synonym: habenulae perforata, zona perforata. (05 Mar 2000) |
| habenular | Relating to a habenula, especially the stalk of the pineal body. (05 Mar 2000) |
| habenular commissure | The connection between the right and left habenular nuclei; the decussation of fibres of the two striae medullares, forming the dorsal portion of the peduncle of the pineal body. Synonym: commissure of habenulae, habenular commissure. (05 Mar 2000) |