| semi | <prefix> A prefix signifying half, and sometimes partly or imperfectly; as, semiannual, half yearly; semitransparent, imperfectly transparent. The prefix semi is joined to another word either with the hyphen or without it. In this book the hyphen is omitted except before a capital letter; as, semiacid, semiaquatic, semi-Arian, semiaxis, semicalcareous. Origin: L. Semi; akin to Gr, Skr. Sami-, AS. Sam-, and prob. To E. Same, from the division into two parts of the same size. Cf. Hemi-, Sandelend. (29 Oct 1998) |
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| semi pupa | <zoology> The young of an insect in a stage between the larva and pupa. Source: Websters Dictionary (01 Mar 1998) |
| semi-apochromatic objective | <microscopy> A compromise, in the correction for chromatic and spherical aberration, between achromatic and apochromatic objectives, such as a fluorite objective. (05 Aug 1998) |
| semi-closed anaesthesia | Inhalation anaesthesia using a circuit in which a portion of the exhaled air is exhausted from the circuit and a portion is rebreathed following absorption of carbon dioxide. (05 Mar 2000) |
| semi-closed circle | A circuit for administration of an inhalation anaesthetic in which partial rebreathing with carbon dioxide absorption is combined with loss from the circuit of a portion of respired gases through valves. (05 Mar 2000) |
| semi-open anaesthesia | <anaesthetics> Inhalation anaesthesia in which a portion of inhaled gases is derived from an anaesthesia circuit while the remainder consists of room air. (05 Mar 2000) |
| semi-vegetarian | A vegetarian who consumes dairy products, eggs, chicken, and fish, but does not consume other animal flesh. (05 Mar 2000) |
| semiacid | Slightly acid; subacid. Source: Websters Dictionary (01 Mar 1998) |
| semiacidified | Half acidified. Source: Websters Dictionary (01 Mar 1998) |
| semiamplexicaul | <botany> Partially amplexicaul; embracing the stem half round, as a leaf. Source: Websters Dictionary (01 Mar 1998) |
| semiangle | <geometry> The half of a given, or measuring, angle. Source: Websters Dictionary (01 Mar 1998) |
| semiautonomous | Of systems or processes that are not wholly independent of other systems or processes. (18 Nov 1997) |
| semiaxis | <geometry> One half of the axis of an llipse or other figure. Source: Websters Dictionary (01 Mar 1998) |
| semibull | A bull issued by a pope in the period between his election and coronation. Source: Websters Dictionary (01 Mar 1998) |
| semicalcareous | Half or partially calcareous; as, a semicalcareous plant. Source: Websters Dictionary (01 Mar 1998) |