semicōˈma noun

An unconscious state approaching coma

semicoˈmatose adjective

semiconductˈing adjective

semiconductivˈity noun

semˈiconductor noun

An element or compound having a resistivity between that of a conductor and an insulator, being either intrinsic, where thermal energy causes charges to cross the forbidden energy gap, or extrinsic, where small amounts of donor and acceptor impurities have been added to facilitate the transition

semiconˈscious adjective

semicrysˈtalline or semicrystallˈic adjective

Having, or being, a partly crystalline structure

semˈicylˈinder noun

A longitudinal half-cylinder

semicylinˈdrical adjective

semˈidemˈisemˈiquaver noun (music)

Half a demisemiquaver

semidepōˈnent adjective (grammar)

Passive in form in the perfect tenses only

noun

A semideponent verb

semi-detachedˈ adjective

1. Partly separated
2. Joined by a party wall to one other house only
3. Associated with, but not wholeheartedly committed to, a particular group, political doctrine, etc

noun

A semi-detached house

semi-diamˈeter noun

Half the diameter, esp the angular diameter

semˈi-dīˈtone noun (music)

A minor third

semi-diurˈnal adjective

1. Accomplished in twelve hours
2. Relating to half the time or half the arc traversed between rising and setting

semi-divineˈ adjective

1. Half-divine
2. Of, or of the nature of, a demigod

semidocumentˈary noun

A cinema film based on real events but with an invented plot and dialogue (also adjective)

semi-domeˈ noun

Half a dome, esp as formed by a vertical section

semidomesˈticated adjective

1. Partially domesticated
2. Half-tame

semi-doubˈle adjective

(of flowers) having only the outermost stamens converted into petals

noun

1. Such a flower
2. A religious festival less solemn than a double (qv; religion)

semi-dryˈing adjective

(of oils) thickening without completely drying on exposure

semi-ellipseˈ noun

Half of an ellipse, bounded by a diameter, esp the major axis

semi-ellipˈtical adjective

semi-evˈergreen noun

A plant which is evergreen in its original habitat but not completely so in other places it now grows, dropping leaves in severe weather conditions (also adjective)

semifīˈnal adjective

(in competitions, sports contests, etc) denoting the contest immediately before the final

noun

A last round but one

semifīˈnalist noun

A competitor in a semifinal

semi-finˈished adjective

Partially finished, specif of metal shaped into rods, sheets, etc, in preparation for further processing into finished goods

semifluˈid adjective

Nearly solid but able to flow to some extent (also noun /semˈ/)

semifreddˈo noun (pl semifreddˈos or semifreddˈi)

(Ital freddo cold) a partially frozen Italian dessert

semiglobˈular adjective

semi-grandˈ noun

A square piano with a curtailed keyboard (also adjective)

semi-imˈbecile noun and adjective

semi-independˈent adjective

Not fully independent

semi-juˈbilee noun

The twenty-fifth anniversary

semˈi-latus rectum noun (geometry)

Half the latus rectum, terminated at the focus

semi-liqˈuid adjective

Half-liquid

semilitˈeracy noun

semilitˈerate noun and adjective

(a person) barely able to read and write

semˈi-log or semi-logarithˈmic adjective

(of graph paper, graphs, etc) having an arithmetical scale on the x-axis and a logarithmic scale on the y-axis (also called single-log or single-logarithmic; cf log-log under log²)

semiluˈcent adjective

Half-transparent

semiluˈnar or semiluˈnate adjective

Half-moon-shaped (as the semilunar valves of the aorta and pulmonary artery which prevent regurgitation of blood into the heart)

semˈilune /-loon/ noun

A half-moon-shaped object, body, or structure

semimanufacˈture noun

A manufactured product, material, etc, used to make an end-product

semimenˈstrual adjective

Half-monthly

semi-metˈal noun (obsolete)

A metal that is not malleable

semi-monthˈly adjective (chiefly N American)

Half-monthly

noun

A half-monthly periodical

semi-muteˈ noun and adjective

(a person) having impaired speech due to loss of hearing (considered offensive by some people)

semi-nūdeˈ adjective

Half-naked

semi-occāˈsional adjective (N American)

Occurring now and then

semi-occāˈsionally adverb

semi-officˈial adjective

Partly official

semi-officˈially adverb

semi-ōˈpal noun

A dull variety of opal

semi-opaqueˈ adjective

Partly opaque

semiovipˈarous adjective (zoology)

Giving birth to partially developed young

semipalˈmate /-mət, -māt/ or semipalmāˈted adjective

1. Half-webbed
2. Partly webfooted

semipalmāˈtion noun

semiparˈasite noun

A partial parasite, feeding partly independently

semiparasitˈic adjective

semˈiped noun (prosody)

A half-foot

Semi-Pelāˈgian noun and adjective

Semi-Pelāˈgianism noun

The middle course between Augustinian predestination and Pelagian free will

semipelluˈcid adjective

Imperfectly transparent

semiperimˈeter noun

Half the perimeter

semi-permˈanent adjective

semipermeabilˈity noun

semiperˈmeable adjective

Permeable by a solvent but not by the dissolved substance

semˈiplume noun

A feather with an ordinary shaft but a downy web

semiporˈcelain noun

A coarse ware resembling porcelain

semipostˈal adjective (chiefly US; philately)

Denoting an issue of postage stamps the profits of which are donated to charity

semi-precˈious adjective (mineralogy)

Valuable, but not valuable enough to be considered a gemstone

semi-proˈ adjective and noun (pl semi-prosˈ)

Semi-professional

semi-professˈional adjective

1. (of a person) engaging only part-time in a professional activity, esp a sport
2. (of an activity) engaged in by semi-professionals

noun

A semi-professional person

semˈiquāver noun

Half a quaver

semi-rigˈid adjective

(of an airship) having a flexible gasbag and a stiffened keel

semˈi-ring noun

A half-ring

semi-sagˈittate adjective

Shaped like half an arrowhead

Semi-Saxˈon noun and adjective (obsolete)

Early Middle English (c.1150–1250)

semi-skilledˈ adjective

semˈi-skimmed adjective

(of milk) having some of the cream skimmed

noun

Semi-skimmed milk

semi-softˈ adjective

(of cheese) fairly soft

semisolˈid adjective and noun

(a substance) of a consistency between liquid and solid

semisubmersˈible adjective and noun

(denoting) a floating oilrig (used mainly for exploratory drilling) which has the greater part of its structure below the water

semitereteˈ adjective

Half-cylindrical

semˈitone noun

Half a tone, one of the lesser intervals of the musical scale, as from B to C

semitonˈic adjective

semi-trailˈer or semi-truckˈ noun (N American)

An articulated trailer or lorry

semitranspaˈrency noun

semitranspaˈrent adjective

Imperfectly transparent

semi-tropˈical adjective

Subtropical

semi-tropˈics plural noun

semi-tūˈbular adjective

Like half of a tube divided longitudinally

semi-unˈcial adjective

(of writing) intermediate between uncial and minuscule

noun

A semi-uncial letter

semˈivowel noun

1. A sound having the nature of both a vowel and a consonant
2. A letter representing it, in English, chiefly w and y, and sometimes used of the liquid consonants l and r

semiwater gas noun see under water

semi-weekˈly adjective

Issued or happening twice a week (also noun and adverb)